Best mat ever. No transfer to the bottom of the irons. Enough cushion to practice for hours without vibration to the hands/arms. Hit down on the ball as hard as you like. This mat can take it. At first I thought the mat didn't have holes for rubber tees, and in fact it did not. However, I soon discovered that the mat accepts regular tees directly into it with no problem. The more I use it, the more I like it.