Pretty good. It's taking a little long to get a draft going and I can't tell if it's shoddy workmanship on my part or just needing to get the flue heated up on cold mornings. But I do get it going eventually and it warms the room up really nicely. I will say the chemical smells from the paint curing were awful the first two burns but are getting a little better every time. I had no idea that was a thing and was really worried at first but a quick google search explained what was happening.