Just finished my first full session in the game (pre-ordered a while ago for my key) - so far it's pretty decent. There are some animations that need work such as the running animation where the arms stick out at an odd angle, and as expected with the beta there are a few smaller bugs (quests not updating, UI has incorrectly linked values etc) and lots of DCs as there is only 1 server and it's packed with people (it has a lot of instances though and the devs have said they'll have a lot more hardware enabled for it within a couple of hours).
Space combat is pretty decent, ground combat feels like it needs a little work to feel more fluid, but that may be because of my character and away teams' low levels.
Graphics are good for an mmo, not the best but reasonably up-to-date, only problem i have is AA is disabled in-game and prevented from being forced on my 5970, but that will be fixed "soon".