Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Warm buns on cold days

This seat warmer works great! Just plug it in to the cigarette lighter socket flip the switch to either Hi or Lo setting and within a couple of minutes you can feel the heat in your seat. I would say it heats almost as good as factory installed seat warmers. The elastic straps seem to be adequate, but you will have to reposition the heater from time to time,as it is made of a lightweight nylon and foam pad and is thin and somewhat flimsey. Also,I would recommend unplugging the unit when you leave the car,so as not to discharge the car battery. After a month of use,just about every day,it still works and looks fine.