A brief update 3 years on from surgery. I have been PPI-free for a few years now. I consider the LINX device almost a cure for the reflux I experienced. I occasionally have some heartburn, but if anything less than the average person if my husband's occasional complaints of it are anything to go by!
Some of my sensitivity is (and was) linked to environmental allergy. When my hay fever is bad, I am more likely to experience irritation in my esophagus from what are likely normal levels of acidity.
All the best to those searching for resolution for GERD!