This is a good stiff boot. I've ridden it on powder, heavy powder, packed powder and ice - it's held up for all three. I took it out on a day of touring and it's pretty good for skinning on a split board too. It took several days to get used to the lacing system, but after figuring it out I really like it - lots of flexibility in what gets tight. I wore an 8 in the Solomon Optimas and the 8 works for me in this boot.
The major issue I have with this boot is the liner. I've been trying to get my heel tight into the liner and no matter how tight I pulled the strings, couldn't get synched in. My heel was picking up and moving around inside the liner. Then I was overcompensating by tightening the outer boot which ended up cutting off circulation to my foot. I took the liners out and realized the issue is that there aren't any laces on the liner at all (see picture). My solution is to take the liners from my old boots and put them in the burton shell. This boot would be unbeatable if there were laces in the liner that tightened around the ankle and heel.