Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Return to Sender

Our experience is similar to that of others who gave this heater a low rating. I like the looks and size of the unit and both of us are incredibly impressed with its quiet operation. Even in the oscillating mode it's hard to tell if the heater is even on.But...The control button on the unit's top is stiff and not easy to turn.Though the heater puts out decent heat, air flow is anemic. One has to be within inches of the heater to feel any air blowing from it.Worst of all the heater shuts off spontaneously and doesn't come back on for various waiting periods. Since the unit was intended to keep Mrs. Spudman warm while she smokes in a very cool room, the spontaneous heater turn offs are a turn off for her.The heater is being returned to Amazon while I search the listings for a replacement.