Forgot to mention... only down side is that the cuff is so large, guessing most people will find what I did: that you'll be unable to fit straight-leg jeans over the boot. Boot cuts should work fine. That said, likely that if it's cold enough for you to wear this boot, you're likely going to be wearing something other than jeans to keep your legs warm... probably a pant with some kind of gaitor, in which case this consideration won't matter.
Once I put them on, I didn't want to ever take them off. Like a cushy, warm, supportive, slipper. The cuff design is very similar to a ski boot. Incredibly comfortable. Compared to Evolution model, Control Max has slightly higher cuff; I found it to be more comfortable. Also, Evolution model is harder to tie closed; loops are much smaller and tighter. Big loops on Control Max make getting in/out easier. Fantastic piece of gear.
These are like a somewhat warmer version of the caribou boots. They're definitely comfortable, and seem to have a pretty high warmth/bulkiness ratio. I took them on a trip to Greenland and was pretty pleased; my feet only got cold during prolonged standing around at ~ -20 F. The insulation on the bottom between the foot and sole is easily compressed, so I recommend getting thick insoles to boost the warmth a bit.
boots are very comfortable and warm and the lugs on the bottom and excellent in preventing slipping.