Imo it's probably one of the best things I've ever done for my body that wasn't diet/exercise related. It was annoying and uncomfortable and being on downers always makes me a wreck, but once that fog cleared and my stents came out, I slept infinitely better, the orbital bones below my eye sockets aren't constantly sore, I don't take a constant stream of OTC allergy/sinus meds, and now, when I do take meds (very seldom - I think there were two days in the last year and a half that my post nasal drip needed help) they actually work.

I also had the procedure where they burn away a bit of the insides of your sinuses if they're too swollen. I don't remember what it's called anymore.