Excellent!
I work outside in NW AZ and it can get cold enough to numb my toes.  Absolutely love the remote feature.  So far I've only needed to use the lowest setting and one charge has lasted a whole week.  Although, I only have them working for about an hour each time.  I have to wear steel toed boots and I thought the soles might be too tight.  They were at first, but then after wearing them a while, they fit just fine.  I recommend and would buy again!
Rating: 5 stars