I played the original launch of the game but it ended up being pretty...bad.
However, the relaunch of the MMO has been really, really good. I've been playing it for over a month and have been enjoying it quite a lot. By no means is the game revolutionary but if you're into the Final Fantasy games you may enjoy it.
The game itself is quite Westernized and rather standard compared to most "next gen" MMOs. It can also be compared to some games such as Rift or World of Warcraft. However, it is one of the only games (Final Fantasy XI) that I know of, that allows you to have multiple classes on one character, which also allows you to maintain ONE character rather than having to make other alts. The end game is pretty decent, though I have not had a chance to really get into it yet. Overall, the game is definitely worth checking out if you feel compelled to try a new MMO. Keep in mind the game IS subscription based.
I can also be found on a couple of servers:
Balmung - Azunai Nevarus
Hyperion - Azunai Sterrsyn
Watching: Orange is the New black
Playing: Final Fantasy XIV