It took me 45 min to assemble by myself with 2 toddlers walking around asking me every few minutes if I was putting together a door, a castle, a house. Instructions were really easy to follow. It heats up quickly and from sitting in the sofa next to it, it was too hot so we just turned the heat off. 

You can see how the mantle doesn’t line up perfectly though. Even from the far away picture you can tell the lines don’t come together perfectly. Maybe it’s assembler error. Not a big deal to me. Wish I would have bought one sooner for our cold MN winters.