Yeah they were some good games, Winny and shadowcorp (man, you're a beast with that alien)
The demo has some serious lobby issues - you can't join a game in progress, so it seems to keep you waiting between games for a while, but if you get a big enough group of friends the waiting is vastly reduced.
My favourite is the marine - just give me a pulse rifle, a motion tracker and something that screams when I shoot it. Sweet.
I can't get to grips with the style of play required for the alien. And running on the walls is pretty hit and miss. But others seem to love it, and I certainly get killed by it a lot. Same for the predator - it's good when (if) I can find the shoulder cannon, that thing owns. But I'm not a fan of first-person melee combat.
But all in all the 3 species seem really well balanced. And the sound effects are spot on. Definite buy for me. I wasn't impressed with my first game (as an alien), but the more I play it, the more I love it. Definitely looking forward to Infestation mode. And the single player. And ranked matches. Oh my - can't wait.
EDIT: Just found my mate captured a game after Winny had left. Shadowcorp is in there as a predator, and you can see him rip someone's spine out right near the end. There's also a sweet view of me (as a marine) getting jumped by 2 aliens. Enjoy...caution, though - graphic content: