Yeah I had a lot of fun on the Xbox version of DDR Ultramix. It's a lot of fun. Unfortunately after playing it a while, you outgrow the plastic/fabric mats. You really have to use the hard surface mats to get going in the more complicated moves.
With the Xbox version you can play over Xbox Live too. I haven't tried it, but I hear it is a lot of fun.
Another bonus is after playing it a bunch at home, you can go to the arcades at the shore and impress a lot of people with your mad skillzzzzz
