Got my Beta code a few hours ago, and after installing/signing up got some game time in. It's just what you would expect from an Age of Empires game. A few things were kinda weird though, The graphics are all cartoony. Which after about 15 minutes didn't bother me at all. At one point I disconnected and had to redo a mission all over again, that kinda put the breaks on how much fun I was having that round. There are a total of three races, You only get to play the Greeks during beta.
There are some good highlights to it as well. Starts off with a tutorial, So you're not thrown under the bus if you're a new player. The Gameplay is very smooth and transitions well on a lower end computer, opening it up to more players then most games these days allow.
All in all, It's pretty decent from what I've seen. I'll have a more in-depth look at it once it hits retail. Enjoy!
For those of you that want to try it out. I got my Beta Key from Curse (the guys who handle a lot of the WoW stuff). You might be able to get a key from there. Good luck!