ive got both. obviously i like the slim more. its lighter comfortable and faster. i dont drop my psp's so i dont know if breaks faster, and mf29 .... psp fat feels more like a "machine" lol is that better or worse than not feel like a "machine"?
i have to one thing to add, when i got my slim, it felt weird, because i was used to the heavy fat one. But now ive been using my slim for a few months, i just hate my heavy ugly fat one, bah
