Summary: Ridiculous! We've had one of thse for about 6 months. Over this period the doors haven't been fully closed four times, and no-one heard the "door alarm" (in at least two cases it had mysteriously turned itself "off"). And guess what: the intense tungsten bright interior lights (indeed Edison's 125 y/o old discovery) remain on. These 2 high intensity bulbs dump at least 50 watts of heat into the interior for as long as the doors remain even slightly open.
Summary: This unit has 4 plastic rollers that are fixed in place and can not be adjusted. There are 2 leveling legs on the front of the unit only. Very frustrating to try and level this unit with only 2 legs. If you already have perfectly level floors then this may work for you, but other than using shims it can not be leveled side to side or back to front.