I just got them and they aren't as warm as others say. I wore them with another set of fleece leggings and I still felt cold. I guess if you wear them under jeans, they should be fine but they're a little bulky.
Don't wear them with light colored dresses or shirts and they get a little stained. It comes off after washing them, but its annoying to walk around with a blackish dress when it was beige.