Pro Easy to learn
It's easy to learn the basics - just select the ships you want to fight with and click where you want them to go. Clicking once will send half the the selected ships, and double clicking will send all of them. Other mechanics aren't quite as simple, but still are very easy to grasp (for example, if you are surrounding a planet which you are attacking you get a significant boost to your damage).
Pro Advanced gameplay is rewarding
While beginners will throw around ships, not caring what types of planets to attack, more veteran players will need to play strategically, taking and holding defense planets to help their front line. Finding a few large strategically placed economy and naval stars will be essential to a victory if playing against harder AIs.
Pro Make your own maps
You can create your own maps which you can play on, including 7 types of planets, 5 different planet sizes, and adding up to 5 players. The editor is easy to work with - adding planets is as simple as clicking on a blank space, and editing them can be done by clicking an existing planet again.