Here they are, my Aion impressions. The post is very long but I've broken it down into sections so that you might be able to skip stuff that you don't care about. This beta weekend is over but there will be more. If you have any questions, leave a comment and I'll try to answer them. If I don't know, I'll try to find out in the next beta. For now, enjoy.
Whenever a new MMO comes out ,the big question everybody asks is "Is this the WoW killer?" - and the answer is always no. So I got into the closed Aion beta and, well, it's not the WoW killer. That said, I don't believe there can actually be such a thing. A good MMO will start sucking subscribers from WoW a couple thousand at a time. If it's really good it might stabilize at 3 million or so subscribers but WoW will die on itself at somepoint in a slow decline, it won't just get killed by another game.
Below the fold you'll find my first experiences in Aion and my ideas on whether the game is worth trying out or not.