I love the realism of this show. In terms of realistic tennis, I definitely put this over Prince of Tennis. But the only reason I like Prince of Tennis better is because it was a longer lasting series and I was more attached to the characters and story. But as far as tennis animes go, this is the best in my opinion in terms of realism. They don't incorporate bullshit shots like Drive B, they call outs and double faults, take into account the physical and mental part of the game, and they depict minute details on how to improve. I love how analytical Maruois too. It makes it very interesting to watch.