Probably opening a can of worms, because my research has seen a lot of grumpy people who absolutely hate this bit for no stated reason. So I'm curious as to what YOU guys have to say about them and why. Don't just say you hate it or you don't mind it if you haven't got a reason
I know it acts as a leverage bit or can act as a snaffle, and is often stuck on naughty ponies as an extra set of brakes. But what else? It has to have a purpose as a training aid under all the misuse, right?