You'll find lots of experiences here from the Nissen Fundoplication, if that is the surgery you are considering.
I had both LPR and GERD symptoms before surgery. My worst symptom overall was a constant severe chest pain. I also had the constant phlegm, but it was very minor compared to the pain.
The surgery eliminated all of my pain. I can now eat anything with no issues. I get no reflux, stomach pain, chest pain. It was hugely successful for me. The surgery did reduce the throat phlegm, but I still have it. It may go away eventually or not, even if it doesn't, I consider the surgery a huge success. The chest pain was destroying my life.
Recovery is no fun, I'm not going to sugar coat it, but you do eventually recover. It took me 4 weeks until I really felt like myself again. I was on a liquid diet for 2 weeks, then soft food diet for 2 weeks, then slowly added new foods in, until probably 8 weeks I was eating everything including bread and meat. The recovery time was definitely worth it all, I'd do it again if I had to. You just get used to lots of pureed soup. :)
It took me a couple of weeks until I could burp normally, but even now I still have bloating problems from time to time, so I think the surgery did cause that. But again, its a minor side effect that I am glad to live with since the pain is gone. I haven't tried to vomit, but its not advisable to ever vomit after a Nissen... some people can and do, but you want to do everything you can to avoid it. Your surgeon will give you nausea medication after surgery to help, as the pain killers you will be on can cause nausea. I can count the number of times I've thrown up in my life on one hand, so this wasn't a big deal to me.
Good luck, feel free to ask as many questions as you like. Many of us here have had the surgery, so you have a great resource.
Nissen Fundoplication - 11/22/11