Product review (2 stars): We purchased this unit hoping it was an upgrade from the Home Depot Magic Chef we had that wouldn't cool below 47 either
This product just doesn't seem to work well. For the first six month or so, it was able to get down to about 38 (the lowest setting), but now it just  doesn't get below 45. And, oddly, after about a week the set temperature began changing itself! It went from 38 to 44. The actual temp seems to hover between 44-46.
We purchased this unit hoping it was an upgrade from the Home Depot Magic Chef we had that wouldn't cool below 47 either. Sadly, at three times the price it isn't any better.