Lots to like but the the biggest unacceptable issues IMO are:

Can't view HD as a basic USB drive (amazing beyond words!)

Wont load onto a perfectly good XP Media Center 2002 (with all the media) AND Install software is buggy (blithering flaw!)

Every video format I have tried RECODES itself when you try to upload the video file - possibly the worst software design for handling portable video ever...  Actually brings thoughts to mind of the economic tragedy of totally wasted perfectly good 3" video displays on devices that cant REALLY display video in any kind of user friendly way.  PSP is two years older and and several generations ahead of this video format malfunction.

DRM and other security layers designed to separate owners from their property (like their disk and unsecured files which they OWN but cant use freely on a Zune) was considered first Priority One.

/Rant ON

Perhaps they (security layers) should have smartly been added as the afterthought which was thrown in later (remember the real lure of the PSP was the fact that they let the cat out before shutting the door with brainfartingly putting out patches which made their device so so lame - now it can almost display a web page but is garbage - havent used the stupid thing since I made the mistake of patching it - MSFT made their device LAME from the start Doh! Yay for big brother locking me out of my disk so I cant even see my files without going through the Zune software).