It was very comfortable to sleep on and stayed in place on the bed relatively well (bunched up a bit, but if you change your sheets regularly it is easy to fix at the same time). If you're used to sleeping with an electric blanket this will be different. The heat is not as "instant" and will be felt much more once you lay on the mattress, not as you crawl under the covers. Even though it is different, it was very nice and comfortable! I could feel the water lines, especially with my hands, but it wasn't really something I felt once laying on them with my body-the lines running through the mattress pad were perfectly comfortable to lay on and did not bother me or my partner.

Had considerable difficulty getting the device to work at first, and this was my second try after an abortive attempt where Amazon shipped me a "like new" reboxed pad - which I found out from the manufacturer they shouldn't have. Suffice to say the manufacturer was VERY responsive and helpful, immediately offered troubleshooting advice and to replace the entire device. The pad does not seem to take near as much water as listed in the owner manual. There are some glitchy bits with the owner manual and controls which I've discussed with the manufacturer and again, they were very receptive. The remote is wonky and you do, as other reviewers have said, have to point it near the back of the device at close range to get it to work. BUT...having said all that, once the device is set up and circulating well, it warms up relatively quickly (I can get it into the 90's in about 20 minutes) and stays warm all night. The sleep cycle is hard to access, but once you do, it works fine, and is very relaxing. I particularly like the anti-mite mode, not sure if it really kills the bugs but it does heat up very well and leaves the mattress feeling evenly hot. I have noticed occasionally in the 80's degrees the feet don't warm up as well, goose it up into the 90's then back down and that seems to fix it. Overall it's a great idea and I will say it is (surprisingly, sorry Neat) VERY comfortable (I was expecting to feel tubes and bumps, no such!). Much better than my old electric blanket! Oh, and the main unit, SILENT. You never hear the pump, which is a little troubling too because I wasn't sure it was actually working! But it did, and never have an issue with sound.

After a week using it, the temp button(+) on the main unit was not working, and also the main unit was making noise louder than before. So I decided to disassemble the unit cause I like this product already. I found that the control pad(touch pad) was not assembled correctly- the spring on the touchpad was not where it should be and one of the power lines stuck with the motor so it made noise. I fixed a few things then the pad works well. Hope the seller read this review and pay more attention on the assembly process