That product has been discussed here before.
but this particular comment in the specs would make me seriously not consider buying such a product:
In reply to:
20 GB custom drive**
** The de200c hard drive is not compatible with PCs or other systems nor is the de200c compatible with off-the-shelf PC hard disk drives
This comment means that the hard disk is a custom model - probably with internal encryption to stop the files being copied off the hard disk except via the inbuilt software.
It also means that when the hard disk in it breaks [the part most liklely to break and probably the hardest to replace in this product] you may not be able to find a replacement - and even if you could, the price may be far more than you want to pay and you have little choice.
This is totally unlike the Rio Central (a similar product to that one above), and/or the empeg/rio car - which all used industry standard drives, thus even if the product is EOL'ed you can still upgrade and repair them without needing expensive non-standard parts.
The Rio Central can have its internal drive upgraded - some folks on the Rio Central BBS have done exactly this.
All In all I'd look elsewhere unless this product was ridiculously cheap and you were willing to live with the distinct possbility of only ever having a 20GB disk for storing your music.
Which for me would be a serious limitation.