Interview was not a big deal.
Just know why you want to work for Comair, what is important for you (I had to explain why I had a 73 type and was not @ SWA (about 200 FW PIC hours short)) at a job and be able to talk flying and CRM (and I had previously talked to my interview Capt at an AIR, Inc. conference!). Have fun with the Cog test...it's just a game.
Remember to ask (thoughtful and relevant) questions!! I asked about the contract negotiations and what they expected of the future - but that was a pretty ballsy move. It worked, I got offered a job.
Good Luck!
Spongebob