I have a 3 and 4 year old. Last June through November I was sick 5+ times – I think related to colds they were bringing home from preschool. Prior to that I was sick every four to five months or 2 or 3 times a year. I work in a very high public contact field. I was talking to my PCP at UCSD and he recommended the Neti Pot. Since then I have used it 3 to 4 times a week and have not been sick one time. My doctor’s theory is that the sinus passages are a launching pad for all sorts of illness. The Neti Pot, when used regularly, keeps these illnesses from taking hold. I am obviously a believer… going from being sick every few months to not having been sick in over a year is worth every penny of the approximately $15 it costs. Some of it is likely pyschosomatic but nonetheless I am convinced it works. Hope that helps.