I had a fitting on Saturday and it is unreal the difference a correct putter will make for you.
I have had a 2013 Go low since it came out and I have struggled to putt consistently for years.
I tried 8/9 different models before being fitted for an X7, the fitter was constantly talking tech which tbh went over my head I trusted him and found the one that really suited me.
Its made a real difference already as my stroke feels more natural now and distance control has improved greatly