First of all, I got this for my fiancée after getting the special Ring Fit theme in Tetris 99. We really loved the music, and so we watched for the game to come up for a reasonable price (my goodness scalpers seem to love this game).
My fiancée really enjoys the game, it is a legitimate workout, really gets you sweating. There are a plethora of workouts to select, though in rpg fashion, you unlock new workout moves by leveling up or assigning points on a skill tree.
The music is great, the graphics are fun, and the fitness component offers a lot of variation and adjustable intensity for all levels of players.