This thing is brilliant at teaching you to not break down and flip your wrists in the putting stroke. It is on loan at the moment to a real putting flipper and has showed him his nasty flipper move that he was not aware of. It is doing wonders for him and at $25 is a steal. I also do what Jim suggests " Practice with a plane laser". If you use the ClydeGuide and a plane laser you can not go far wrong.