| Hi there. I haven't had one of these personally because i use a warburton kit. But my mate has had one and said that it was very good. Not sure if it was made by bach but i assume they're all similar.
He said the only problem with using a cornet mpiece in a trumpet was that you loose some of the 'bite' and it doesn't always sound quite as bright as when using an actual trumpet mouthpiece. But he said that it was an excellent alternative to having to either buy a trumpet mouthpiece in the same size or as close as you can get, which would leave your wallet feeling a little lighter and your embouchure wouldn't be exactly the same.
Hope this helps.
Dawny x x |