Bought my copy today at another store (sorry amazon, couldn't wait for you). Maya, the trainer gives you a fitness test including jumping jacks, push-ups, lunges, and crunches, and then recommends a custom program for you. For me, she recommended a long term goal of cardio and today's focus was upper body. My 30 min workout was approx 15 min of cardio, 10 min of upper body strength training, and a few minutes each of abs and stretches. You follow along, more like a dvd than a video game. At the end of each segment she asks how hard it was for you, and the game uses your answer to adjust your next workout.
I started with 3 locations, and 5 more to unlock. Lots of music choices. Workout choices are yoga, cardio, upper body, lower body, abs, and flexibility. Workouts will incorporate whatever equipment you have: hr monitor, ball, hand weights, and step. No balance board option.
Much better workout than wii fit, and way more fun than a dvd or live class.