I originally gave this game a good review, but with the updates, they killed what was originally good about it.
If you want to try it out now, be prepared for long wait times to get into matches. This used to be a good fast paced PvP-only game, but the developers slowed it down a bit and tried to throw some PvE in...
The original battles - 4v4, Vortex, Deatnmatch were good and should have been improved upon before adding more battle types -- by adding more, people were more spread out and then the population disbanded to other games. Plus, the company that made the game filed for Bankruptcy in December of 2007.