So when I first got this although it worked fine, it would fly all over the place and crease when playing. However just a 5 nails a side, secured to a square of 6mm MDF. And the pad doesnt configure properly If your standing on the mat. So if you read other reviews of pads not working, that's why. Playing using step mania and it's great. Very Accurate for a cheap mat. Also: If you add some 3 mm thick by 300mm squares of hardboard under each pad it's easier to feel the pads and stay on point.