I recently met a fellow who used a plastic mouthpiece with his BBb Bass. He said that it was comfortable, had a nice sound and gave him more security in the lower range. My music teacher recently bought one, and he says it gives a more "brassy" sound. I've only ever played with one for about 10 minutes and thought it was pretty average, but probably because I was just used to my Perantucci. What are you thoughts on these revolutionary brass band accessories?