I have one. it's good, there were some controller issues but i believe that has been greatly improved with the new ones (new cap to the joystick and contacts rotated 45 degrees so x and y have greater contracts than the diagonals)
I mainly use mine to play scummvm and ultima 7
I do have back to the future on it though!
ngh! the boot times have fallen with latest firmwares, firmware installation has become safer and faster. to run things, you simply put them on the sd card, turn on and play. simple and quick