Review on 🏌️ Enhance Your Putting Performance with the GoSports Golf Putting Alignment Mirror – Standard and XL Training Aids for Improved Accuracy by Fuzzhead Nelson

I bought the 16 inch model. The lines help with ball alignment as well as eye positioning. I was surprised at how far I lined up inside the ball. Now, with practice, I'm more comfortable with my eyes closer to the ball. It really helps me see the line better. Mirror. I lay the mat down so I can't comment on how it performs on grass. Based on my experience I expect a good performance on grass. It's a pretty minimal investment for a really good help.