2nd one of these purchased and just as expected broke after 2 months of use. When working it works great and keeps you comfortably warm. Warranty is a hassle, must send in a card. Ordered the next generation today and will send in the broken unit under warranty so passenger can have a butt warmer too. As I said, for $20 keeps you warmer than with just a heater but do not expect this to last more than two months.