Just from my experience, I don't use double-plastic boots for climbing, only for backcountry ski trips.
I use a Solomon boot, which is all leather and leather lined. It has a plastic rand at the bottom, making them fully step-in crampon compatible.
I also use vapor-barrier liner socks, so the inside of the boots stay dry. I hike only in my VBLs...no other socks needed.
I don't have a problem with them freezing, as the outside stays dry (there isn't alot of moisture around in the dead of winter), and the inside stays dry due to the VBLs. Therefore, they don't freeze overnight. I switch to some down booties for the campsite (with a built in mukluk/gaitor and a closed-foam pad inserted for full deluxe camp-comfort).
The double-boots are certainly nice, but I personally didn't think they were comfortable enough for my tastes. I love to hike in leather (boots), the feeling of the full calfskin lined boots on a bare foot can't be beat. Nor do I want to trudge around in 5 lb. plastic boots all day, either. My climbing partner wears plastics on every winter trip. To each his own.
Yes, if standing for a long time, my feet will feel it a bit. These boots are not insulated. However, I don't stand for a while and change once I get camp settled up. The warm water bottle does help to warm them up in the morning, but usually just by moving and packing up them warm up anyway.
Again, just my opinion on what I found works best for ME. Statements made across the board are just that for everyone's replies....OPINIONS.