I'd say "Meh-to-decent"
First off, I don't really care for MMOs. Oh sure, the concept is fine, but the practice is generally just too rote and grindy.
I'll give them credit for making a single-player accessible MMO, one that stays as close to KotOR as it does in an MMO setting is impressive, but still misses the mark by quite a bit.
The music, worlds, atmosphere, etc is all very well done and enjoyable if you're a Star Wars fan. And for the first several levels, the gameplay is enjoyable as well.
But after your 40,000th fetch quest, your 50,000th "Go here and kill 20 XYZs and bring me their bodies" or "Go here and bring me X, which involves killing hundreds of XYZs too", my interest began waning.
If that doesn't bother you, or you don't mind grinding, it can be enjoyable.
But the waking up moment for me was on Hoth as a Jedi Knight, having to kill a certain number of Wompas for a quest and to level up, and I remember just watching TV, not even looking at the screen, while I clicked around for hours on end trying to level up. It was at that point, I realize I was trying to amuse myself while playing a game. My game...needed a game.
I cancelled my sub not long after.