Very nice boots.. just replaced my GTX's that were 10 years old and this was a great upgrade. Fit great right out of the box. The full leather means fully waterproof.. a nice 4-season boot if you don't get too gnarly with the mountaineering. Compatible with universal crampons, although wouldn't use them on ice. Great for everything from snowmobiling, hiking, whatever. Used them for roughly a year and although the leather toe area shows signs of wear, that is expected with 120+ days on the trail. The sole is in great shape still and I'm confident these boots will outlast the previous pair!