Second pair work fine so far
I had to return the first pair as one of the insoles would not charge.  Received the second pair within 3 days and they charged just fine. I’ve used them twice in my cycling shoes in sub-45 degree weather and they work really well to keep the chill off. No problem with doing a 2 hour ride using shoe covers and these inserts. Will they last? Who knows, but they seem pretty well made and durable on the surface, and the remote control is pretty cool and functions well. I ride pretty much every day if it’s over freezing but I limit myself to an hour long ride if it’s really cold because of cold feet. Hopefully these will be durable throughout this winter to support longer rides in really cold temps. So far so good. I would have given them a 5 but the first pair didn’t work.
Rating: 4 stars