My first impressions so far. I can get about 1.5 hours of gameplay in before the game becomes incredibly unresponsive (fps dropped 3). When it gets to that point all I can do is shutdown and reboot. Now I got a decent rig, back in my wow days I could max all the graphics, and run with 200+ addons and still get 30-40fps in Dalaran. I can't get anyone else to confirm this same issue with me, but I think DX9 or a memory leak is to blame.
Today they released v210 and a new planet. I got on the new planet fast before all the nice grassy fuel spots are taken. I started building my city up and the game froze 3 times in a matter of five minutes (last freeze is because the server crash apparently). Overall I think its a change of pace from the conquer the world type games, but not worth paying what ever the conversion rate of 7 euros (one site said 9.99USD) per month.
Its early though, and if anyone else in the beta my name is themajority and I am on Titania.