Our whole family and most of my friends now sleeping on the water cushion. I take it even while traveling, when I'm traveling for more than a few days. Until a half years I had daily new cervical blockages, especially during stress, which were very difficult to get rid. Since I sleep on the water cushion, I had not one more. That alone's enough for 5 stars. Add to that that I go to bed at night and wake up in the morning relaxed - it was mostly as I lie down at night have. Amazingly, however, was. And what concerns the temperature - our bedroom is not heated and we almost always open the window - the pillow is neither colder nor warmer than other pillows. However, I also do not arm under your pillow. You should already know that the water tank is located below and not above, then you are with the comfort and temperature.
We often give away the pillows on various occasions and have received so far always great feedback. Hats Only two people not previously so fit - but that is way it is. So best to try and play around especially with the amount of water in small steps - with me have 100 ML made the difference.