I thought it played like Warhawk with Spartans... I kid, I kid!
I personally liked it although I've only played a few matches at a friend's house (not having a 360 myself obviously).
It was still fun but it felt like there was more depth at the same time. I also liked the new engine and the chunkier feel. There were hints of some balance issues, but I haven't played enough to be sure. I figure that achieving final balance is probably one of the goals for the Beta so I'm not worried on that score - yet anyway.
Too early for me to have much more of an opinion than that but my general experience was very positive.
Try to be reasonable... its easier than you think...