Yay! Tera!
It is a very fun game in my opinion, I play a male Castanic warrior up to beta caps so far. Its a very pretty game, and I love the combat mechanics so far. I used to be a very competitive gamer in shooters and even another mmo, but honestly I haven't touched any of the pvp stuff; I've just been enjoying grouping with people and friends, or solo grinding (not sure why, but I love solo grinding o_o). So far the PVE is great! Easy at the start like most games, but it gets more challenging.
If anyone is looking for a fun game, I highly recommend it. Considering they are (I think still?) implementing a pay system similar to eve online, you should be able to pay with in game money, so theoretically it won't cost you anything after you buy it! I don't have a ton of details myself, but I know there is info on their main site.
Anyway, just because I personally can't say it enough, its a great game :)