Summary: I'm not kidding, for 51 minutes of use, I was only able to get 21 minutes of exercise. The around the world stuff you can't skip or fast forward thru and the long instructor chatter after you finish an exercise consume a great deal of time. If you have the patience to deal with all of the dead time you can't exercise in between getting your actual workout time, then it's fine. You can play with one remote controller, but two are better.
Summary: Too cartoony and kiddy-like for my taste. The travel around the world feature is annoying, and wastes time if you just want to continue to the next exercise. If I wanted a geography lesson I would have bought a travel guide. The wii-motes don't pick up movements accurately. The trainers talk too much and are annoying as ****. The actual exercises though I mush say do give you a good cardio workout, and the measuring of time and calories are a plus.
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.