I've been using a Monette Prana TS11 S1 on a Yamaha Z custom 897Z and yesterday swapped for this Yamaha Nils Landgren piece. It's got a slim rim, a little like the Christian Lindberg, but is rounded nicely so after a while playing is no problem. The key to the mouthpiece is the depth of the cup in relation to the rim. It gives a great accuracy across the extreme ranges of my instrument; pedal notes are super secure. I've had it a week and played a gig with it last night. Super pleased and an excellent price (not all mouthpieces have to cost £300 to be any use I say). Would recommend if you are playing on a small mouthpiece but want some depth to the lower register and good broad sound. Using this with the Z1 leadpipe.