Other things I liked, were the amount of races and/or talents/curses that come with the core book, allowing you to make crazy and unique characters. There aren't classes per se, because everything is based off of the skills you choose during character creation. The mechanic of play is pretty simple, your attribute (i.e. strength, agility, intelligence, etc) determines which die you roll, then you add any skill modifiers and try to beat a target number.
There are some drawbacks to the game. First, the layout isn't the most user friendly in my opinion. For example, not everything is presented in a logical order, and sometimes one important piece of information is buried in a paragraph of text in odd places. Also, they give conversion rules for D20 systems allowing you to convert monsters from other RPGs without "too" much trouble, but I would have liked some pre-made monsters in the book to make things easier because at the heart of this game is combat techniques which really add flavor to the battles.
Overall, I'd give this game 7/10. It's face-paced in that the combat scenarios did bog down and seemed to move quickly. Character creation wasn't very difficult either, even with the amount of combinations to be had. Just be prepared to annotate the book or make your own index.
You can get the book here: http://midnightcampaign.com/midnightcampaig_nsite/mayhemsplashpage.html