I have plodded my way through the legs of my 2020 Advent Socks, pair number two. The sock on the left is using my new Flexi Flips and the pair on the right is on a normal 9 inch circular.
I cannot tell an appreciable difference between the two needles. Both are making consistent socks. I am not seeing any laddering with the flexi flips either. So far, pretty pleased with both. I could see myself using either comfortably depending on my mood.
All I have left on these socks are two cuffs. Feels very nice to be so close to a FO. I always get a little mood boost when I can pet a finished piece.