For $15, it's a steal. The customizability of the game is insane. The built in roster includes pretty much everyone of note in Japanese pro wrestling and MMA, and a decent number of American pro wrestlers. You have a max of an additional 500 CAW's which is great. From there, you can break up your roster into promotions (which you can customize and upload the ring logo) and furthur break it up into stables and such.
The gameplay is a little odd at first, but the learning curve is quick. Within a few hours, you'll have a good grasp at the controls.
The one knock is the graphics on the game; its very dated. But at a $15 price point, an easy yet competitive control system and the largest roster ever it's very easy to overlook.