This game is a great alternative to D&D if you are tired of the current (4th) edition of D&D but also feel that 3.5/Pathfinder characters are still a bit too powerful or complicated. The rules are simplistic, but still allow for flexibility.
The rules seem to be a fusion of 1st and 3rd editions. Like 1st edition, you roll 3d6 for your six attributes, each class has a separate experience point table for reaching the next experience level, and has more than three saving throws. Like 3rd edition, there is no minimum attribute requirement for classes, it uses a Base to-hit rather than the confusing THAC0, uses a target number for each skill/attribute roll, has 0-level spells for spellcasters, and has death at -10 hit points.
Saving throws and attribute checks are rolled into one mechanic. Each attribute has a saving throw/check target number, which is either 12 or 18 depending on whether it is a prime attribute or secondary attribute. Each character has two (or three, if the character is human) primary attributes; one of which is determined by the character's class, and the other(s) chosen by the player.
There are optional parts to the game, most being the more controversial parts like receiving experience points for gold earned, multi-classing, or (my favorite) the choice to use miniatures or not.
All in all, this is a welcome change from other D&D clones on the market. It may not be for everybody, but a good number of gamers should be able to enjoy this game.