In One Word - WOW
I bought this today after reading all of the amazig reviews on PLAY.COM and oh my.....My legs are like jelly, I am really finding it hard to walk!!! It really does give you a run for your money.
The fact that I used it for half an hour and sweated like no ones business and my legs are like jelly, tells me that this is one serious game! I look forward to using this every night and can't see myself getting bored of this anytime soon.