These are pretty good.  Nice and soft on the inside, warmer than regular leggings, but not really warm enough to wear below 30 degrees without an additional layer.  They have a good stretch and good fit (I am 5'4'', 130 lbs and ordered the M/L). I did not notice any chemical odor as some people mentioned.  I have noticed some minor pilling after wearing often for about a month, but it's not too noticeable.  Overall, I would recommend them.