I've been beta testing for a few weeks, now. I'm enjoying it quite a lot.
I can compare it to EverQuest (since that's the only other MMORPG I've played at length): at first I wasn't too hot on the idea of my primary avatar (except when I'm in a starbase) being a ship, as it seemed cold and/or mechanic. But before long you feel like you're interacting with the pilots of those ships, and it all works out fine. One great thing it has over EQ is that the best equipment (engines, weapons, etc.) is player-made. The amount of "camping" is considerablly less than EQ, though it's not entirely eliminated. While there are some dynamic quests (that is, semi-random quests), they're not very impressive. The non-dynamic quests (intentionally designed) are pretty good, though.
All in all I'm impressed.