I'm glad you've joined our forum! I had the surgery in February 2009. My main problem was that it was creating a lung problem. I have asthma, and the acid that was refluxing was creating constant inflammation.
Since my reflux was never as bad as yours, the doctors weren't sure that it would solve my problem. However, my lungs were very bad, and I really didn't have a choice--I had to try it.
After the surgery, my lungs improved 100% (minus some allergic asthma issues), and I am now off most of the medications I was forced to take to keep them open and breathing.
After about a year and a half, I think it may have gotten a bit looser, and I started getting a little lung reaction. After encouragement from my asthma doctor, I went to a surgeon to see if I needed a redo, and after all the tests, he said that my wrap was just fine, and he wouldn't ever touch one that was intact and looked as good as mine did.
My situation is a bit different, as the asthma needs only a tiny bit of reflux to cause them trouble. Anyone without asthma wouldn't even notice a change.
Still, my lungs are still SO much better, and I almost never get a heartburn sensation. I consider the surgery to be a success, and am very happy I had it.
If I begin to get enough reflux to get my lungs into the condition they were before the surgery, I will definitely have the redo surgery, without hesitation.
People who have had the surgery often need some medication for reflux. However, even with that, most are very happy with the results, as the amount of medication they're taking is so much less, and they're not suffering the way they did before the surgery.
As I'm sure you've read here, the most important thing is to get a surgeon who has done many, many of these procedures. (300+/more than that is better).
The other thing you need to keep in mind as you consider this option, is that many people who have this surgery don't post on the internet. They have the surgery and go on about their lives. People who have problems are more likely to seek out forums such as these.
The Nissen surgery has been helping people with severe reflux for decades. Is it perfect? No. Can it be a lifesaver? Yes!