This indoor or outdoor putting mat has two lanes for practicing, which vary according to the level of challenge you seek. Shoot for the regulation size hole or the slightly smaller one next to it, and the gravity-fed return will send back your misses. Is the perfect putting mat worth it?If you have the space to commit to a putting trainer, the Perfect Practice Putting Mat is a great choice. The ball return makes it easy to put in the time perfecting your stroke.