This is my first pair of Montys, though my husband has had probably 5-6+ pairs. I couldn't resist the Blue/Gray/Yellow colorway! They're just as bright and gorgeous in person. I'm typically a 9.5 in Danner boots but went with a 10 for the Monty, as I normally do with boots I haven't worn before. I was wise to size up a half size, but that could be because I have a fairly wide toe box. All in all, no break-in period needed. Comfortable out of the box.