This is a great product. Now I don't have to move the sofa every time I want to fire up the PS2!
The shoulder buttons on this controller feel more comfortable and easy to use than the dualshock2, and the whole thing has a slightly rubbery feel to it. It's comfy to hold, and does't slip. The L3/R3 buttons are not as easy to push as they were on the dualshock2, but I'm sure I'll get used to them.
This is well worth the money. It even comes with batteries so you can play straight out of the box (3xAAA, in case you're wondering).