I just use mine as a passover...when I remember to fill it up. I can't really tell much difference with or without water. The heat bothered my asthma and I would wake up congested, so MD said don't use it.

I have been using the OptiLife for a week now. I really like it. The hose coming straight down and being very stiff is the only problem I have with it. But as I've used it the hose has softened and is not as much of a problem now. I am a back, side and stomach sleeper and I have been able to sleep i...