Marks on the glass will not come off. A series of what look like bubbles on the top right....AL discovered after mounting and finished.....last step removing the protective plastic on the glass.
Instructions to remove glass were incorrect. Said to remove lower left screw which did not release the glass. As it turned out the two, not one, screws that needed to be removed were inside of the blower vents on both the left and right.
Unit makes a constant buzzing noise when on that isn't quiet background noise. The only way to drown it out is to turn on the blower. So much for ambiance as the days get warmer.
Would not recommend purchasing.