Our fireplace insert is a welcome addition to our home. Heats a big house pretty well. We've had two negative issues. One was a terrible whistling noise, which we solved by putting foil tape over an airhole and repunching with a pencil (you can search online for this known issue). The other is the poorly designed blower fan. It rattles badly and works its way off the inadequate attachment system, falling on the floor periodically. the thermostat button also emits a high pitched rattle which we've fixed with foil tape on the edges. Still a constant battle with the bigger rattle on the days we need to use the fan.