Summary: I bought this game expecting it to be a step up from the Wii Fit but found it to be very similar. There is a greater selection of games availble with Exerbeat but it has the same limitations as Wii Fit. You don't seem to be able to exercise for any one time for longer than 6 mins (and during these exercises the Avatar stops every 2 mins for a mini break).
Conclusion: Exerbeat has exactly the same limitations as Wii Fit. The longest time you seem to be able to exercise for at any one time is 6 mins (with the avatar stopping at every 2 mins for a break). I was hoping for a game that would give a proper cardio work out with a continuous work out of over 30 or 15 mins with out a break to really get the heart pumping and work up a sweat.