Feet stay warm and dry. Fit is comfortable.
I like the speed zone lacing (pull on 2 strings on either side of the boot to tighten and lock the laces - one side controls above the foot while the other side controls the shin laces).
I would say the only drawback to this lacing system is the extra string that you have to tuck into the boot once you've tightened it. There is a nice little slot for lace handles to fit into but the excess string you end up with feels messy to deal with. This is a minor complaint and overall does not detract away from the performance or value of the boot.