I am two years out and popping started about 3 months post op and never stopped. Pain never stopped on outside lateral side of knee either. To see fourth consultant. Have 3 different opinions on what to do: nothing, live with the pain; arthroscopic surgery has 50% chance of helping; revision. One pain doctor wants to implant peripheral nerve stimulator which is a no go as well as revision as of now. Rehab was horrible and had complications. Recommend seeing someone for the pain.