Jeep, I made and used a catfish loop up until last season. The only reason I ditched it was I have a 28" draw length and decided to shoot off the string to gain some fps and ke.

The loop was very easy to construct and worked as advertised. Once applied however, you need a bow press to remove it unless you cut it and make another one. You also need to use some sort of nock points, or at least I did, as I couldn' t get the loop tight enough to stay in place.