Its a well-made little add-on.
Its so small as well, but it doesn't mean it feels cheap.
The buttons are nice, a tad too small, I find myself typing with my fingernails. The touchpad feature is pretty cool but I'm used to a mouse other than say, a laptop touch-pad, so I find it a little tricky to use, other than that its pretty cool.
Rather than using typical Tab button for capital letters, you use the pad's shoulder buttons, which suits the pad nicely, seeing as it was built for a console control.
The little hot keys on it are useful as they take you straight to your friends list or straight to a blank message box, ready for you to type and then send.
The PS3 already has the keypad's software built in, the second you link it up with your system (just by plugging it in with a USB cable) it instantly works, even some of the keyboards icons appear on the PS3.
If your controller has a cover over it like mine (a rubber protective skin) then you'd think it would have trouble fitting on, but it doesn't due to the little sping-loaded hook that grasps on to the back of the controller.
The only downside to placing it over a protective skin is that you can't use the Start, Select or PS button, but if you don't have a protective skin, then you won't encounter this problem at all.
Overall, its nicely made, its a great add-on and its alot better than having to use a wired USB keyboard.
For £18, I recommend it. 8D