I've been wearing these for several months now on a regular basis. The Mountain Fit system actually works really well. They're burly, relatively heavy boots. To me these harken back to the load hauling boots of the 90's when a 60lb pack wasn't all that uncommon. Only they are much, much better and not as heavy as their ancestors. They articulate well in the ankle and are surprisingly nimble. The support is fantastic, I'm routinely carrying heavy loads and the support level with the comfort level is mind boggling to me. They are sealed perfectly, not a drop after spending a great deal of time in wetlands and even in a river ankle+ deep for several hours. Dry as a bone. If you need a boot for many miles of heavy, heavy loads and really rough terrain I really don't think there's a better option. I'm rating them true to size with the assumption thick socks are part of the equation.

I bought these boots less than two weeks ago and they are becoming my favorite pair I've ever owned. The fit is excellent. I have very narrow feet. In most boots I have a lot of problems with side to side movement, but not with these. They snug right up and fit like a boot should. The tread on them are very aggressive which I like. The tow box is roomy enough for me to be able to wiggle my toes and not slam into the front of the boot on steep downhills. If you're looking for an aggressive solid boot that is comfortable, look no further.