Product review (5 stars): Why would anyone expect a full-power fridge/oven in something USB powered?
Read the description! It says it's a "fridge-style cooler". It's not a fridge, nor is it an oven. If you put in something cold it will keep it cold, and if you put in something warm it will keep it warm. It will NOT cool something warm or warm something cold. For heaven's sake, what do you expect from something so small and powered only by USB?

I have meds that must be refrigerated and that I need to take on an empty stomach. With one of these in my bathroom I can take them in the middle of the night without needing to go to the kitchen in the dark. It runs 24/7 with no trouble at all, and only needs to be replaced about every 12 months. Pretty good for the price! I admit that after about 6 months the motor gets a little noisy, but it's in the bathroom and doesn't bother me. I love it.