Absolutely love this game. The adventure mode is the right kind of cheesy and the RPG elements are thoughtful enough to make you feel like you are progressing. Increasing the difficulty level just increases number of reps required to complete an attack but it makes a huge difference. The mini games are thoughtful and fun AND VERY responsive to the controller movement. I really hope Nintendo decides to continue with this format of interactive game. Would love to see a Mario party set up to the ring con and leg strap.
Also, if you want to REALLY up your challenge, play the game with wrist weights and a resistance band around the legs.
I started playing this three days ago and will be playing an hour a day, changing nothing about my lifestyle other than playing an hour. I currently weigh 275 lbs and will be monitoring twice a week to track progress.