I gave this cool slumber pad 5 stars because it works for me. I have it strapped to an extra pillow that I grab in the middle of the night when I wake up and can't fall back to sleep. As soon as I feel the cold under my head I fall back to sleep instantly. There are some negatives: 1. The pad does not stay cold for long. I can't say how long because I'm asleep for about 2 hours before I wake again and the pad is no longer cold. I'll be ordering another pad soon so that I have a second cold pillow to use when needed. 2. The pad feels like a piece of soft cardboard under my head despite the fact that I have a pillow case over the pad. Thanks to this pad I now feel well-rested all day.