I've had the salitair almost a week now. It's certainly made it a bit easier to breathe through my nose but after finding a bit of initial improvement (going by peak flow readings) my breathing over the last few days is the worst it's been for a while. Strange thing is, it's not even consistently bad. I can get a good reading (for me) off my peak flow meter and then a couple of hours later feel as though I'm struggling for a decent breath. It doesn't seem related to the timing of my salitair use so I'm not going to say it's to blame. It's hard to see how it could make the breathing worse in any case.