There is nothing better than this to see the 30 angle. Even the 90 line is better than the cue joint line.
It was tough to get on the cue straight, and it takes a bit to get used to how to quickly see the paths. Once you see them it works better than you can imagine. The point to the paths that are written in all the pool books.
Nothing else allows you to see the cue ball paths like this!
Oh, the sticker's line wore off on one of my stickers and I emailed the manufacture. They sent me new stickers!!