it's cool...
65% of the time is used watching videos.. so i'd suggest to get a large memory stick also. for an on-the-go type person, i watch anime or movies on the shuttle bus, or play music videos in the celi.
the other 35% is spent on RSS audio (wireless streaming audio), browsing 6gc in bed early in the morning,

... and of course, playing games..
if you find one with firmware v1.5 you can play emulators from other systems (SNES, GBA, SEGA, etc..) as well as other homebrew software (check out
http://pspupdates.qj.net/ for more info. but after an update, you'd lose that capability but you'd be able to browse the net, listen to RSS audio, share pics through wifi, change your wallpaper and much more..
-if i were you though, i'd get mine from eBay than buy them new. and try to get those package deals that come with 1gb+ memory sticks with game/movie bundles.
anyway.... all in all, to me it was money well spent!