Had deviated septum and polyps taken care of all at once. One polyp was about the size of an olive! Was told to stay out of the water for about 8 weeks, but actually stayed out longer for non-related reasons. Left nasal passage was so small due to deviation of septum that Dr. had to us pediatric tools.
I have a Dr. who is top of the line on this stuff, and is on DAN list of ENTs who know about dive medicine (NYC area). His techniques require no packing post surgery, and can be done under general or local anesthesia. The most painful part of the process has been the post-op debridement, which basically is the sucking out of the nasal cavity and removal of any scar tissue. Depending on your Dr. and conditions you might only get one or two of these followups, or several.
Another byproduct of the surgery is that my snoring has now been significantly reduced...almost eliminated, so no more bruised ribs from my wife hitting me in the middle of the night!!
Now daily routine includes use of neti-pot to keep sinus areas clean. If you are not familiar with this check out the video here:
http://www.nutraceutic.com/Products/Yoga/Neti/RhinoHorn/Video/Yogaskolen_T1.wmv
The problem with sinus surgery is that, as mentioned earlier, it is not always done properly the first time. I have found that equalization during flying and diving is much better, and other symptoms are pretty much going away. Relief of symptoms may be immediate or take several months, but I think the stats indicate about 80% of people who have the surgery have noted at least a fair degree of relief. YMMV
Scubamax