If you're getting along okay, it's really not the time for surgery yet if you have NTOS. If you have a vascular form of TOS, you may want to think more seriously about getting the surgery. People with venous or arterial TOS tend to do better after surgery and have things like clotting, pulmonary embolism, stroke, and gangrene to worry about. If it is NTOS and you're getting along okay then usually more PT and whatnot is what is advised especially if you're seeing some progress there.
I had all three types of TOS, my symptoms were mostly neurogenic. I just had surgery a week and a half ago and I feel pretty darn good. I can tell that even if the surgery didn't help 100%, it certainly helped quite a bit. Yesterday I felt better without the post surgical pain medications than I did before surgery. So yes, sometimes, in the hands of a good surgeon who knows what they are doing, surgery is successful. It's nothing to jump into lightly though!