I got this for Time Crisis and The Shoot (before I found out how poor most of the Time Crisis game was).
The size is great for adults, most of the shooters available are for much smaller hands.
There are two problems with it - the extra compartment to give space for the strap can rub against the side of your finger, and the trigger is like the trigger on a water pistol. I know lots of the other gun controllers for the playstation have had the same type but I'm sure I remember a few with regular triggers. It just doesn't feel like you would expect it to feel when you're playing the game.
Apart from that it's been the best one I've found.