Love these so much. They're warm, soft, flexible, and comfortable for just about everything. I've rock climbed outdoors with them, worn them to work and walking around town through the rain/snow and they are great for all of the above. Temp-wise, I was expecting them to be toastier, but they're incredibly comfortable and warm to about 40 degrees. Maybe add a base layer or leggings for hiking or whatever in cooler temps than that.
Size wise, I am usually in an awkward place between a size 4 and a size 6 so I went with the 6 to account for layering and potential increased winter weight, and right now the waist fit is a little loose, but perfectly fine and functional with the drawstring. That said, I think they run large through the waist for a typical size 6 (worn high around my waist, not low around my hips), and they're about 1-3" too long for me depending on whether I use the drawstring to keep them tied up higher on my waist (I'm 5'5"). They're a little baggy through the back and legs but that makes them easier to move in for hiking/climbing and just more comfortable as far as I'm concerned. Sizing aside, I love them and would recommend :)