Just finished playing the L4D2 demo. I had a hell of a time. I kept giggling at the excessive gore.
Highlights/favorite moments;
Finding and using my first guitar as a melee weapon. Fucking flipped and held it forever.
Coming across the new infected. The Spitter is absolutely foul. Same goes for the female boomer..
Shot off a Common's ass. Literally. I almost wish I took a screen cap. It was amazing *sniff*
Encountering the first Hunter. Holy shit new sounds? FOR THE WIN.
Going into the hedge "maze" and hearing the new Witch, fought the hoard and still couldn't find her, Kept looking finally found h- OH GOD SHE WALKS NOW WHAT.
Pros: Higher AI levels, More zombies, Southern themed soundtrack with Jazz feels (made me feel right at home~ 8D ) Melee weapons, and ROAMING witches.
Cons: The demo *seems* to be missing "Bacteria" (The jingles that play when a special infected is nearby or attacking.) for the new infected, This is possible that its not available in the demo or I didn't have the sound settings loud enough.
Final Verdict:

November 17 couldn't seem more far away. D:!