its pretty good from what i heard, but some of the emulators still arn't up to speed, and it uses 2 AA batterys... so be ready to spend tons of money on those (you could try the rechargables, but i heard they only last 2 hours when playing games and such, for comparasin, on normal ones they last 4-6 hours on video and games (says so on their website))

also, the pricetag is a bit big for something like this (200 bucks)

when you compare it to the psp which has a lithium ion battery, 800x480 display (gpx2 has 320x240) and unlike the gp2x, the psp supports 3d rather well.

overall its only really worth for the emulators (which arnt really all that legal, nor all that good yet.)

give it time and maybe the next version wont have a craptastic qvga screen and will have a freakin lithiom ion battery (anything with AA batteries in it these days comes off pretty cheap).