Fun, Free and Addictive
Players (Summoners) can choose from roundabout 50 champions, one of them, they can bring to the field. Champions can be buffed via a skill tree and Runes which both gain as the Player levels up. Currently only 2 maps exist - one 3v3 and a 5v5 environment. Repetitive maybe, but dull - not at all. Riot Games is constantly expanding the content (new Champions and skins), so it is most likely only a matter of time before new maps pop up.
The Gamespot Score might have been justified at the time of testing, but since then the game has seen quite a bit of improvement and today appears very well put together.
So, if you haven't tried it yet, give the game a shot! Warning: Competitive players will get hooked immediately, in fact LoL has great potential for esport. Also, the community-/ user-support is exemplary.
Downsides are:
* lack of map variety
* user database is split in US and Europe, which prevents players from different databases from playing with another.