Funny.... I just spent a night in a BCS with the zip in panel just the other night.
Yes, the pitch sucked. We weren't digging out anymore snow, and the ground was frozen (thank god I had big ass nails in my stake bag, I broke 3 Durapegs in a row)
Plus an EdT cylinder stove.... It's badass. I don't know the exact weight off the top of my head, but it's a lot lighter than the Sawtooth and "Medium" I was rocking.
I really want to get my hands on a BCS2 now