Well....
After four days of playing, pretty much non-stop apart from sleep, all I can say is that I'm still very impressed.
There are niggling bugs - the guild management is pretty broken at the moment, and joining dungeons as a party can be challenging as you can end up in different instances. There have been issues with the login server too. However, for the launch of a major MMO, the majority of things 'just work'.
Proto and I have been doing our trademark 'play nonstop through the content'. I'm at about L48 and Proto isn't far behind at around L43. There is SO MUCH to keep you involved in the game, it's pretty unreal.
So, it's totally recommended from this camp
P.