Upon receipt and set up the heater seemed promising. However, the digital thermostat died within the 1st 24 hours of operation.

ACF Greenhouses: I'm sorry your thermostat failed. We will ship a replacement to you today!

My biggest complaint when using electric space heaters in the past is the crappy thermostat they all have on them. This heater feels like it is higher quality than ones I have used before which is good. The best part though is the included plug in thermostat. I love that I can set the ON and OFF temperatures to whatever I want and it just works like it is supposed to!

This heater is a nice, compact, easy-to-use little heater. The heater it puts out heat that is quite sufficient for what's needed in a small greenhouse..I would recommend this product.

I'm using this in an 8'x8' greenhouse and it is doing a great job at keeping the temp around 50 degrees. My main concern was just making sure it did not freeze inside the greenhouse but this thing is doing better at the lowest setting. So far after one month I am impressed and especially so for the price.