You play few matches, and after that your hands hurt and you have to quit. You come back after few days, and notice that you can't remember most of the moves because you played so little before tiring out. Again, you play few matches, but not enough to actually learn anything before tiring out. This loop continues, and you are getting nowhere. It's a very, very good game if you are already a pro-boxer. Also, boxing with move controllers is cool and hardcore, because Danny Trejo says so.