I have bought and tested the ER2, ER5, ER6B, ER6R, ER8B, ER8, ER8.3, and ER10. I did my own putter fitting with the Trackman using all of those putters, and the ER6R (Red) with the gravity grip was the best match for me. I have been using it for about6 months and love it! Been putting about 27 to 30 putts per round, which is really good for me. I have been wanting to try the ER11vML, as I am really interested in the Wrist Lock. Oh, and I putt looking at the cup, which is why Evenroll is great for me, as I don't hit the center of the putter face often. I hope to be selected!