I didn't think they could one-up themselves after Planet Robobot, especially on their first (real) attempt at a 3D game, but I couldn't be more wrong. The exploration, the minigames, the boss fights—everything translates so well to the third dimension that you are left wondering how they didn't attempt this before. The soundtrack is also top-tier and the level design is just as you would expect from the series: it's a breeze to just move forward and finish the stages, but if you go for the secrets, challenges, and post-game content then you are in for a more refined and engaging experience that makes the transformations mechanics truly shine. 
Highly recommended; it's a modern classic already.