I played it for a few months, and here's what I liked and didn't like:
- I had much fun leveling because I like story. If you don't like story you're in the wrong game.
- space combat is a rail shooter and becomes boring very quickly unfortunately.
- didn't try PvP so dunno. I heard it isn't well balanced but they wanted to change it
- If you played WoW you will be disappointed by the dungeons. I had a lot of fun the first few times. In fact it was the lack of a good endgame that made me quit the game a month after I got to 50
- The gameplay is too similar to WoW for my taste, but I think most people like it. I would have preferred something... different, like AoC or GW2 do it.
- the graphics engine looks ok
- the crafting system is similar to WoW but not that boring, which is good. Unfortunately on high levels there are very few good items to craft.
- Story, story, story. I liked the personal story of the soldier and the Jedi Knight. Jedi Sage wasn't that good but also well done. I heard the one for the smuggler is very funny. Having your own ship and your comrades on board feels really good. It's really like KotOR.
- My reason to quit was mainly that I had a guild with RL friends of mine. When they quit I became very bored, because I don't like to play with people I don't know and there isn't much to do in the game when you are alone.