The lag ruins it

It's a good mat, much better than the wired one that comes with the game. Sadly, the wireless timing just doesn't work. There's a lag: when you hit the mat, it takes the system a microsecond longer to register with the Wii than if using a wired mat. With non-timing games that wouldn't be a big deal, but with DDR, it makes all the difference. You also can't adjust yourself to it, because the hands still work perfectly with the beat (if you are good enough to sync your hands perfectly and your feet a tenth of second slower, you're better than me). And of course, that tenth of a second is the difference between a perfect and an ok. It's very demoralizing! So, yeah. It would be great to have a wireless mat. This just doesn't work. I'm returning mine.