I am a XXHighEnd user with a bad experience of PurePower to contribute to those considering it.

I tried to purchase a PurePower 1050i in October 2010.  The European distributor had two available at a discount (I gathered later that they were flushing old stock) and I ordered one.  It took three weeks to do just that - the man was a terrible communicator.  The unit arrived, eventually, after a month.  On plugging it in, the display immediately went to FAULT!!!.  The unit passed a current to my equipment (at that point just a lamp as a precaution), but the display was clear, even when restarted.  I asked if there was anything I should do before returning it.  After one week of fruitless back and forth I stated that I wanted to return the unit as I no longer had confidence in the product or the company.  No reply for five days until I sent another email demanding a response with a read receipt.

At that point the US Sales Director got involved who immediately relayed to me the wonderful accolades that a recent customer in Scotland had sent.  He ended with:  PurePower is the real deal, worth a little bit of hassle for what it does.  I guess that is why he is head of sales!  He won, I wanted the unit after all, so I tried to work with a technical guy in Canada.  The result was Fault!!!

It took ten days before I got a response from the USA that he would get the European to arrange for a return.  It is now 16 weeks later.  The unit was returned only five weeks ago, and I heard nothing back from Europe or the US.  I sent an ultimatum last week that I would put the matter in the hands of an attorney if I did not receive a confirmation of payment by the end of today.  The Head of Sales read it, but never responded.  The European distributor responded with a promise to make the payment.  Today I notified them that they had missed the deadline and immediately received a response that the payment was sent and they could fax me the slip.  That was followed by an email saying that the payment failed, despite them having my international payment instructions since December.

A long story.  I am contributing this because I would have wanted to read it when I was looking into PurePower. 

Peter
I am still a user! 
If you want to add handling for cover art at a track level that would be great for me but from the start of this whole thread I made clear that I was not trying to be demanding - about anything. 
I am quite used to working with music player development teams as the products evolve and they all have compromises: the best user interface, the best tag management, the best ripping, the best playback.  I use different applications for each of those though they ALL do ALL the functions, just better/worse for my use.  I also regularly buy and try other applications, as I have with XXHE. 
I will keep using XXHE for a limited purpose - HiRes files.  This is not because Redbook does not sound 'best' on XXHE - I am sure it does, Roy - but because working with a large library brings in other considerations of usability, responsiveness, etc.  I am sure that you have other users with comparable libraries and they are willing to work with your structure because of how they weight the same considerations - such as SQ - differently than I do.  I am not comfortable working with XXHE for my whole library nor am I willing to change a file structure that works fine with my other applications in order to accommodate XXHE.
Just different perspectives based on different experiences and different priorities.  We all chose different cars and different HiFi systems.....
Thank you all for your suggestions and encouragement.  I apologize if I have offended anyone or taken up too much of Peter's time!
Peter

PS  I think SQ is a quest with no end, Roy.  CDs have problems.  DACs have problems.  Music production and mixing has problems.  Jitter has problems.  There is only so much XXHE can do to try and get a clean digital stream from wherever it is coming to wherever it is going.  XXHE is just trying to not ADD to the problems!

Peter
You have very strong opinions and I am not trying to argue with you vis a vis your own product.  I have followed your site since inception and seen the evolution, and personalization, of the development process.  The genius of your approach is that it is your genius and no anyone else's.  I am not going to compete with you in a debate about your genius.
I agree that sound quality is uppermost and you seem to have done that with Engine #3 and the ability to stream variable sample rates without re-configuration.  Sound quality is why anybody will bother with XXHE, including me.
As I said, I will use XXHE for the limited purpose that takes advantage of its uniqueness in playing HiRes files.  That is only a few dozen albums.  I will use other applications that better suit my style to rip, organize and play Redbook files as that is about 5,000 albums.
As a fully paid-up customer of XXHE I look forward to the future developments of XXHE and its emphasis on sound quality.
Peter

Not quite, Peter.  The lowest folder is Album Artist not Artist.  Therefore each folder does contain all the tracks of an album - some Album Artists are "Various Artists" or "Soundtracks" etc.  Artist is part of the filename.
All coverart (one image only) is stored in the file tags for each track - redundant, yes, but also comprehensively simple and storage is cheap.  I have an IT background to and the issue here is that tracks are independent files that can be played in any order or ported to other devices individually.  My 19 year-old daughter hardly knows what an album is, but she has lots of tracks.....  Albums are pre-packaged playlists, not the primary atomistic entity.
Yes, I see now that I can search for the album name using the T flag.
No, it means that \Candye Kane is a folder with two albums and two cover art JPGs.  These JPGs do not need to be in the folder (and usually are not) since the image has also been stored in file tags.
I assume that I am correct that there is no database with tag details behind a 'library' object.  You could still do this without a database by reading the Library collection and storing the tags in a non-persistent array.  That, unfortunately, does expose you to all the issues of tag inconsistency.....
Thanks,
Peter

Peter, I do not mean to take your time with this.
My music is organized like this: ReadyNAS Pro\Media\Music\Album Artist then all tracks by that Album Artist in FLAC with consistent naming of files and Tags, including cover art.
Example: \Media\Music\Candye Kane - 26 files belonging to 2 albums.
I go to Library and select \Candye Kane from internal Explorer.  Library shows one cover image with the directory path and (FLAC).  Double-clicking on that image selects all the tracks and adds them to the playlist - very dangerous for some directories that have hundreds of tracks as this takes a LONG time. 
Clicking on the Library image shows two cover art JPGs in the right-hand space (Gallery?)  Right-clicking these images shows a list of options, mostly about manipulating the image itself.
Right-clicking on the Library image shows other options.  Load albums is grayed out.  Load individual tracks is available.  Selecting that opens an Explorer window to select files, which I can do and they go to the Playlist.
If I do not do this but try to Search for an album in the Candye Kane directory, I can enter "Whole Lotta Love" in the Search box.  This just displays the same image in the Library space.  Double clicking this adds all tracks again.
Playlist tracks are automatically sorted by Track No - I see there is an alternative by Date.
So.  I think XXHE has no database or data model based on Tags.  I think Album means the lowest level folder object.  I think cover art is just JPGs in the lowest level folder (assumed to be Album).  I have no idea what Search is searching on since the filenames include the Album name.
Therefore.  I will restrict XXHE to only my HiRes directory path and take advantage of its ability to pass Hires files with changing sample rates to my Minerva.  That is fine and good enough.  I will not use it as a player for the 60,000 other Redbook files that I have because I am not will to reorganize into 5,000 directories by Album!
No problem whatsoever.  Thank you.
Peter

Thanks, Peter
#1 is fixed.
#2 is bizarrely difficult.  I think that you require an Album to be a Folder.  I have folders by Album Artist with all Albums.  The only way to make that work is selecting by individual track (Individual Album is grayed out).
I have Undemoed and will just wait another year or so to see where you have gotten to - it is a lovely work of passion and commitment.  Thank you.
Peter

Installed 0.9y-4 on dedicated Vista music player with Weiss Minerva via Firewire.
No installation problems, but
1. Playing 24/88.2 Linn files brings up error box saying Engine 3# has terminated.  Clicking that brings up a notification that Engine #3 did not restart.  This doe snot happen with any specific file nor after any specific number of tracks.
2. I cannot find anything resembling user guide for how to manage Playlist/Library/Gallery (whatever that is).  I am experienced with PC audio but this user interface is not obvious as to how to arrange playback.  Yes, I use the internal Explorer view but how to get from there to playback seems to be trial-and-error.
Looking forward for using XXHE for playback of Redbook and HiRes files.