i play on a yani metal for my bari (tip size 7) for my bari and it is great, i wouldnt reccomend it for alto, i dont know which horn your gettingg it for, its a little too bright. but if your going tenor or bari i would go with at least a 7. anything smaller and you cant get the true sound it was meant to make.

I played a metal Yanigasawa 5 on alto for about 3-4 years or so while I was in graduate school and into my professional life (with a metal 7 on tenor and metal 7 on soprano). They were good pieces, but left something to be desired. I ended up taking a masterclass with Brandon Fields that changed my whole outlook on mouthpieces. The metal Yani's have a square chamber which alters the airstream too much (and the saxophone tube is round). Nowadays I can defintely feel a difference between a round chamber and a non-round chamber mouthpiece. Most of my setups are round chamber (with the exception of my legit alto and tenor setups which are horseshoe chamber). I wrote a two-part article where I address this very issue. You can read it at: www.saxophone.us/sax/sax_mouthpieces_the_working_saxophonist.html Good luck!