Not being a fan of many fighting games like I am, I was quite a bit skeptical of this game, but I found it suprisingly fun to play and had many innovative features. The fighting is not the greatest by a long shot, but they are not all that terrible.
The feature that I enjoyed most was the "hang-on" feature that allows you to hold on to the ring if you are about to fall off. This can be used to create a very interesting strategy for some verteran players. And although it may not seem like a big deal, the robot fighters are a break from the norm and allow for a different feel in this game.
Any fan of fighter games should definatly rent this game and see if they like it, then decide what they would like to do with the game. But if you are not a big fan of fighting games, like I am, just forget about this game.