Originally posted as a comment, recycled here for your convenience!
The game last night was fun and against an excellent opponent. I lost -- by one lousy contested objective. Massed demolisher, hellhound and battle cannon fire does a number on Khorne Berserkers, that's all I can say. Still, not a bad result for never having played the army before and (literally) making up the army list about 45 minutes before the game started. :)
I didn't really learn anything I didn't already know about CSM, though. Berserkers are ridiculous in CC. Daemon princes are hard to kill and a one-man (daemon?) wrecking crew. Outflanking Chosen should (when playing against a tank-heavy IG army, anyway) have meltaguns and not flamers. I'll do a post about it later with a nice re-cap and lessons learned. :)