Cost: $29.99 to $34.99.
Pros: Maya, its virtual trainer, knows 400 exercises and can give tutorials on confusing ones midworkout.
Cons: After only 16 sessions, players can get through all the music and exercise zones. It "got repetitive," said Carly Haley, from Boise, Idaho.
Coming Next: The sequel, to be released fall of 2006, will increase the number of exercises Maya can do to 1,000. Players will be able to listen to their own music and thanks to beat-matching technology, Maya will move with the rhythm.
Cost: $49.99, including an EyeToy camera.
Pros: Kinetic uses a camera to track a user's movements and then offers real-time feedback on performance. It's less a training session than a game with goals: say, ducking to evade moving objects. "You're really doing squats over and over again without realizing it," said Glen Raphael, from San Francisco.
Cons: In low light the camera fails to register some movements.