Puts out nice heat and good price/performance ratio are the best attributes of this heater. Quality is ok at best - some sheet metal screws were missing in the housing. That led me to open the unit and I re-tightened all screws and fittings - not a big deal and I would recommend you do that to be on the safe side. The paint job leaves a lot to be desired but for this price, you can't expect to win a beauty contest. The directions are the worst: I have no idea why the instructions are printed in the smallest possible size, the translation is horrible and it covers several different controllers. I am an electrical engineer and was only guessing and just kept pressing various buttons until it kicked on because the instructions are of no value. Hint: It takes quite a while until the pump is primed (you hear a clicking noise) and the unit sputters a bit at first. I will use to heat a garage when working cold weather or as an emergency heater during a power outage.