I believe the number one factor in performance of these refrigerators is "venting". In a properly vented situation they seem to work well. Since there are so many variances in installation by different mfgs. we all get different results. Some cool at all temps while others suffer after an ambient temp above 80-85 degrees. As stated, extra fans inside and behind help those not properly vented. I can deal with having to be relatively level, having spots that freeze things, but I'm not happy when I'm camping in warm temps. and I have to worry about the safe temp of my food. Mfgs. should be held to a strict standard for installing and venting these units.