Assos is my go-to brand for cycling shorts and now for knickers. I cycle about 5x/week for 3+ hours at a time and the Assos products always provide much more comfort than some other brands I have tried (e.g. Gore, Pearl Izumi). Weather-wise, I use the knickers in weather below 50 degrees F and in rain. As noted by other reviewers, the knickers did ride up a bit in the calf but nothing too annoying - I find bib tights a little to restrictive in the ankle area so this is a small tradeoff for me.
Riding for over 30 years (many centuries, numerous double centuries, Everest Challenge finisher) and have tried many brands of ride shorts and knickers, and I always return to Assos for the fit, comfort and quality. The Mille GT Spring/Fall knickers are my preferred shorts when the weather is cold or slightly chilly. I wear a size medium at 5'8" and 165 lbs. I always have two pair in my closet in case I ride back-to-back days!
I used Assos bib knickers and bib shorts for over 20 years. Whenever I try a competitors brand they don't live up to the satisfaction of Assos shorts. The fit and chamois are the best, and these Mille GT Spring/Fall knickers are no different. Comfortable material and they keep you warm in the cooler weather.