Overall, very happy with the unit but does not work well in larger rooms - not enough heat. Instructions are vague WRT to arranging fake logs. I ended up printing a photo of the unit, arranged logs from that. Mine went into an existing brick fireplace. After sealing off the flue, I made a riser for the unit out of 2x4s and Hardy board, painting it flat black. This helps with the heat distribution and addressed an issue I had with the fresh-air feed built into the fireplace. Overall, am happy with the unit.