oh come on... madcatz isnt that bad.

Theres been reports of that keyboard flying across
the room if you leave it on while playing.
Since there ARE games that you need to move the controller (Resistance, heavenly sword, etc), i would be afraid it would snap the mini-B... or maybe bend it. : /
Also- According to comments, its a pain in the ass to put back on.
Just buy a blue-tooth mouse+Keyboard. Works MUCH better. typing with one right now. My PS3 is basicaly my computer now...