The surgery is painful, but if you have an excellent surgeon and hospital, they will keep the pain level manageable. The knee probably won't get any better over time and you might end up having to get a TKR anyway. I am 85 and had bilateral knee replacement on July 1. I had never had surgery before and didn't know what to expect. It's not a walk in the park but the nurses in the hospital were the best. They made sure I was comfortable and kept the pain level down. Two days ago I started walking without a cane. I am so glad I had the surgery. My advice is if you are having the surgery in September, ask quetions, do researcha dna get all the information you can so you are more comfortable doing the surgery. Then go to PT at least a month ahead of the surgery. I rented a recumbent bike a month before the surgery and that helped to build muscle in my legs. It was a very good investment. This group is the place to be if you have questions. I wish you the best and I am sure you will make an informed decision after you gather all your information. Good luck!