The game uses a single "d20 + modifier ≥ target" mechanic for everything. Characters can be created in less than 5 minutes. The writing is concise and clear.

A lot of meta-tools such as templates, etc, that make combat encounters incredibly simple to construct. Great tools for creature-building. A lot of good information on world-building. You can make any type of game efficiently, from hack-and-slash to role-playing. If you have played in a D&D campaign, this is a great choice for your first outing as a GM.