I purchased this controller because i have always felt the PS3 controllers are too small, the toggles are in the wrong place and the triggers are utterly useless as your fingers just slip off of them. This one seemed to take more of an Xbox 360 style approach with better toggle positions and curved in triggers. The grip too also appealed greatly to me.
Unfortunately this device, while extremely comfortable, seems to only work within a few feet of the console to the point where I've decided to just keep it plugged in to play. If i didn't, it just keeps cutting out every few mins or if i lean back into my chair its suddenly too far away (maybe 7ft).
I've also noticed that the controller needs to have a direct line of sight to the USB sensor required to make it work with the PS3. Sometimes i sit at my desk in the corner of the room as opposed to the sofa directly in front of the TV. From this angle the controller will not work where as the PS3 controller does. Sometimes blocking it with your knees whilst sitting back will interrupt the connection.
I really find myself wanting to use this controller due to how comfy it is but find that i dont trust it at all to stay connected without a cable plugged in
My verdict is:
Good to hold
Terrible connection distance
Cuts out frequently