I have one to use, they are fantastic. Better than I think sometimes. I ordered dots and now I realize it works really well without them. I am using it in my bk yard net and works great. I was on trackman all winter and this is really good.
Great idea. For me i really can't tell how a putter rolls . I can see the technical stuff how its suppose to roll but i have never used one and i have had lots that i would say man that rolls well. Just me