I think this anime is a little underrated. The fighting matches are great, they are brutal and raw, with some moves being pretty realistic and others more superpower like.
There is not much to the story, basically is a tournament where you have to defeat stronger and stronger opponents. There are some contradictions to the plotline but I don't want to give anything away. You'll probably watch this anime for the action scenes anyway.
There is a lot of fanservice at the beginning episodes but that goes away after a while, focusing more on the fights and moves of each opponent.
Basically, I would recommend this anime if you like fights and violence, and who doesn't?