I don't have any portable game system so I couldn't tell you if the system itself is good, that said my opinion would be is to look at reviews of games you think you would like to get for it,if none of them sound good after reading the reviews you probably shouldn't buy one.
I like my PSP, when you get used to some of the sort of awkward controls there are quite a few great games on it. Liked it better then my DS.
Lol i have my GBA in front of me. In bits. Waiting fo rme to put them LED's in it Ya, i only need some money now Then i can get a psp lol