It's awesome. You can either take a created superstar or existing one and venture through different paths involving the various titles in the company. The best part about it is that stories branch out whether you win or lose. There are a few times where you must win, but most of the time the story will adjust to whether you pass or fail a match. It creates quite a few scenarios for each of the title paths. Then, after you beat it, you can go back and play as the defending champion for an even different path. Add that with a shop where you can buy unlockables, and the amount of custom characters that can be made, and you have a fantastic game with great replay value.
Edit* Oh, and the gameplay mechanics are pretty good too.