Many years ago I played professionally, but got out of the business to pursue making a little money. Now that I have retired, I have gone back to playing again. I used to play on a Giardinelli 7S screw off rim mouthpiece. The 7S is a very shallow cup that made playing in the upper register a bit easier. When I started playing again, I tried an old Bach 7C for the bigger sound, but my range was really hurting so I tried the 7S again. My range was increased quite a bit, although nowhere near what it was when I played years ago. Since the plating on the 7S was pretty worn, I tried finding another one, but since Giardinelli went out of business they are difficult to find, especially the screw off rims. I have been playing for close to a year this time around and my range is close to what it was before. Still looking for another mouthpiece, I saw the Bobby Shew Lead advertised and decided to give it a try. Switching between the Shew and the 7S at the store, the Shew added about a minor third to my range. This is pretty nice, and in the upper register the horn just sizzles. The Shew is even shallower than the Giardinelli and not only did it increase my range right away, but those higher notes were easier to play. (A high F on the Shew was easier to hit and maintain than a high D on the 7S.) The problem is in the lower registers. Coming down to the notes on and below the staff, the sound quality is not as good as with the 7S (or other larger mouthpieces, probably). If you are looking for something to play lead with, to really belt out the notes up high, this mouthpiece is definitely worth trying, but you may have to work on your sound in the lower registers. I have been playing with the Shew for about 3 weeks and my sound in the lower registers has improved, but still not like the 7S.