This jacket is fantastic. I'm 5'9" (160-170lbs) and the large fit perfect. I use this jacket for basically everything in the winter; skiing, xc skiing, snowshoeing, biking to work, walking around town and other assorted winter activities. The jacket fits great, and can handle a base layer, a mid layer, and a fleece jacket on those -20F days or impact gear on other days. On the other end of the weather spectrum, with the vents open and the jacket unzipped, I have no trouble regulating heat in the backcountry; xc skiing or otherwise. Plus, when it gets too warm, I just roll the jacket up and wear it like a fanny pack.
My home resort is Crested Butte and in the past two seasons I've taken some big falls in this jacket (cartwheeling over rocks and through trees) with little more than a scuff. I've been speared by tree branches so hard I've gotten stab wounds and the jacket remained undamaged. Same with tumbling over rocks. I bleed and the jacket is no worse for the wear. I use these with the bombshell bib and the one exception to being bomb proof was a fall last year where, during the yard-sale, it appears as though the pants got slashed by an errant ski across the knee. My impact gear (the hard candy shell kind) may have served as an impromptu cutting board. Regardless, Backcountry replaced the product immediately. You guys rock! Your products are amazing and your customer service is even better.