Although PSP is pretty big for a portable device, there still people who having a hard time holding on it. People with big hand may feel that PSP is too small to hold and may drop the PSP often. It is annoying of course if you get your PSP slip out your hand.
This new accessories may help you to play PSP with more stable and good grip.
Flexible Hand Grip Pad Advance for PSP-2000, is an accessories designed to get a better hold of PSP
Well, this accessory makes you fell like holding a console controller. Just with a wider size. I myself don’t like this because it makes my PSP not too portable anymore. Anyway my hand isn’t that big.