I had a key for the beta version. It was as good as I hoped it would be. The way they paired the power, sewage, water, and electricity with the roads is genius. Far less complicated than previous SimCity games, and much more user friendly. In fact, my fiance who has never played a SimCity game jumped right in and was able to build a town with minimal direction. I have to say that I am not pleased with the always online servers. It caused huge amounts of lag upon loading and massive problems with their servers kept a lot of people from being able to play the beta version. I'm hoping they really have their ducks in a row upon launch, otherwise they'll have a problem just like Blizzard had with Diablo 3. The game itself looks really really good. The final graphics are going to be spectacular. I even noticed many of the major Sims 3 building (the town hall and grade school in particular) showed up, which I was super excited about.
One of the things I really didn't care for was the zoom functionality. I'm a massive control freak and a big micro-manager and I found it difficult to see everything that was going on at once, simply because I couldn't see my entire town at once. In fact, I am so used to the way the camera in The Sims 3 functions, I had a really hard time managing what I was looking at period. Something that comes with time I guess.
Bottom line comes down to this: I've already pre-ordered the game, as has my fiance. I think it will be well worth the money and I can't wait to play it.