This game is too awesome to describe, it has the fast action like in quake 3, but it looks better and its more strategic
The classes are quite well balanced, you got a solder, engineer, field ops, covert ops and a medic, boath have some nice bonusses, for example being able to use boath your MP40 ánd a panzerfaust and better accuracy, being able to hit more targets in less time with your sniper rifle.
The game includes some awesome sniper action as well, because there are so many maps there are always good sniper servers, so it goes from really fast action till realy stealth action and sniping, it has everything with great movement.
Don't think it plays just like RTCW, because in the mean time ET has been updated so much and there are so many mods, especially with jaymod with double jump enabled it really enables you to do some nice trick/strafe jumping and make the action really fast. One of the nice things about this game is that 1 skilled person can really make a difference, compared to many other games.