Eh. It isn't groundbreaking, but when it was called a cross between DDO, Tera, and GW2 I had to agree with that. You move around a lot for the combat, flanking bonuses are a thing, there are no mana bars, just timers. The graphics are pretty good, it runs decently on older computers, and as stated you don't have to buy anything to enjoy the game. It makes things easier to do so, sure, but that's the F2P model. There are various ways to get Astral Diamonds as you level, which can be sold for Zen (much like the GW2 gold for gems thing), both of which are the prime currency for buying things from the AH or specialist merchants.
It has a "Build Your Own Adventure" feature, which you can access to creat with once you get at least one character to a certain level. Can't remember what it is off the top of my head, though. Solo and group friendly, solid gear drop rates so you don't have to use the AH if you don't want to, all of the classes are fun in their own ways. There have been far, far worse MMO debuts, both F2P and non-F2P. And this one is still in Open Beta. Given that, and the whole free thing, I think it's worth giving a shot if you have even a little interest in it. *shrugs*