The Just Dance series is very good, and each version has been an improvement over the last. Just Dance 4 has awesome features that I love. First, when playing in Just Dance mode you can choose which dancer you want to play in duets or dance crews. This is great, I got tired of doing the same dancer over and over in some of the previous games when I was playing the game by myself. Second, the Just Sweat mode is greatly improved. I could choose from three time options (10, 25, or 45 mins). Having just done about 30 mins of regular play, I choose 10 to see how it went. Once started, there was a warm up and at the end there was a cool down, both are greatly needed when exercising. The work out also determined how I was doing when choosing the next song, I am happy to say that all my songs were intense. It also kept track of the calories burned. So, the most important things to me in my workouts is knowing how long I've done the actual exercise for (it didn't keep the time going when I wasn't dancing), and how many calories I've burned, and Just Dance 4 finally provides me with those numbers while keeping the workout fun. Can I burn more calories doing some other workout game like ExerBeat (huge fan), yes, but Just Dance 4 is way more fun and right now, fresh. It will be a regular part of my weekly workouts. Plus, the music is just plain awesome, I loved doing the Time Warp in Just Dance mode.