Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Okay heater, but doesn't last

I own the Delonghi oil-filled radiator model number TRN0812T. It gives added heat to a room, but it doesn't last very long at all. We've had it for about three years and only used in maybe 20 or 30 times and it doesn't even turn on anymore. It's sitting in my cellar in my junk pile after only 20-30 uses.