I was so tired of finding the microwave lid on top of the microwave or beside the microwave or in the sink.... clearly someone didn't like having to put it back after they had warmed up their meal. So, I thought what am I out if this thing doesn't work. It arrived the day after I ordered it and it is great! It sticks well to the roof go the microwave. It has a nice lip on it which allows air to move through it easily. I would definitely recommend this item.