I live in Los Angeles, so it's only been cold enough to wear these once. Tough life, I know! They generally stay up - just had to pull them up once during a 60 mile ride.
I didn't give 5 stars because as I putting them on, I could hear some seams popping, which causes some concern as to their longevity. Will certainly provide updates as I get a few more uses out of them
I wear these with standard bib shorts and the extra coverage on colder days is great for staying warm. The tops have grippers on the inside next to your skin and outside next to the shorts so they stay put.