The box art may seem a bit cartoony as do the Anime-esc character portraits but it is actually one of the best looking and performing games when in motion, has quite an interesting story and a lot of meaningful customisation options.
The only downside to this game are probably the grudge matches which more or less requires a guide to get through. Otherwise though, it puts quite a few 3DS games to shame as well as the other Custom Robo games that came before it.