Have heard nothing but good things from the product and the company. Everybody I've talked to says they swear by them.

They are made 1 town away from where I live so there are a lot people around here that use them.

I personally don't have one, but that isn't to say I don't want 1. I just don't need it. I have plenty of warm clothing that keeps me comfortable.

So back to your question, yes from what i've heard they work well.