It's nothing revolutionary by any means, but the combat sure is different enough to be extremely enjoyable, especially as a caster.
Not to knock the game too much, because I do enjoy it, but I have to ask; To everyone saying the combat is "different, so it's fun"...what other MMO's have you played? Anything not tab-targeting based? I recently got back into Tera because this game reminded me how good Tera's combat was(and still is), so I imagine if you enjoy the combat in this game you'll like the combat in Tera a lot more(maybe not, but it's a lot more fluid, the controls feel better, etc). The one thing Neverwinter has over Tera, IMO, is the character progression. I feel like I could build my Cleric at least a couple different ways and end up with very different characters at max level. In Tera, any two max-level slayers(or any other class, fresh level 60's) are going to be pretty much identical(down to wearing all the same gear and everything).