i got sick recently and started using it after a surf.not sure if it really works,but surfing dirty water and then cleaning it all out with saline solution makes sense.to prevent sickness,develop daily habits.get fresh air outdoors,exercise,stay fit,eat natural food,get a good night's sleep,take leisure breaks to relax,surf as much as possible.Surfing is a healthy habit!
Definitely works to clean out your sinuses. I use it after most sessions and whenever I feel like I need it, feel so much better afterwords. Make sure not to use it if your nose is so stuffy that you cant breathe through it, the water will get stuck up there and cause more sinus problems. I love mine though, feels great afterwords!
i'm a fan as well. got turned on to it a couple years back & i've noticed a marked decrease in sinus infections since. could be coincidence, could be the neti pot. i don't have enough info to say for sure.