I’ve heard nothing but great things about these, and Steve Kaldestad is playing them, which is one heck of a testimonial!   D’Addario sent me two complete Demo kits of these quite new Alto and Tenor mouthpieces and I will be stocking them in the studio for students and colleagues to try.  Just believe everything D’Addario says on their site and in their ads.  “Vintage inspired.  Legendary Tone.  100% precision crafted, milled from solid rubber.”   I’ve already written an article about them for Clarinet & Saxophone magazine and Canadian Winds, and am just awaiting the even newer D’Addario Reserve classical Alto saxophone mouthpieces for review before sending it in for publication.  You owe it to yourself to try these!  They are up there with the Vandoren V16 mouthpieces…almost…just not as consistent in tip openings and rail symmetry.  That’s not unusual….in my experience, no one except Backun is as consistent as Vandoren in hitting their specs.  So try a few of these to pick the very best one if you are interested.  Like Vandoren V16’s the Altos are modelled after 50’s Meyers and the Tenors are modelled after 50’s Links.  Far better than the current “Link” and “Meyer” mouthpieces which are hand made with poor quality control and are incredibly inconsistent.  “Hand-made” or “hand-finished” is a pejorative in my opinion…unless a great artisan is doing it right in front of you to your taste….