CjR
I happen to play a stock mouthpiece that came with my Simba tenor. I've been playing sax on and off for 34 yrs.
Personally, I see no reason to change it because I happen to like it. I couldn't ask for more out of a mouthpiece.
The bottom line is comfort and sound.
I could care less if it was made out of paper mache, just as long as I was satisfied with it's response.
The chamber is fairly average and the tip opening is wide. I happen to let the tip of the reed
extend slightly past the tip opening. That's probably a personal thing. The facing is average. I don't have specifications on it because it's a stock piece.
I've tried metal mouthpiece's in the past and hated them. I used to own a brilhart white mouthpiece
like Bird and Getz used and I loved it but it cracked.
In my opinion, It doesn't make a difference what type of mouthpiece you use, just as long
as the one you choose allows for easier agility to the highs and lows of the horn.
It's such a personal choice because everyone's oral cavity is different. The way we play from our
diaphragm, the pressure we exude on the reed, the way we shape our mouth as we approach each and every note. I find it fruitless to ask opinions based on mouthpieces, reeds, even saxophones because ya have to go and 'personally' try them out yourself to actually get a definitive answer that only you can be truly satisfied with.
Advice is fine because it will give some understanding what others use. However, never buy a mouthpiece, ligature, reed, and especially a saxophone based on another musician's assumption on what they feel you need. Could be a huge waste of money!
Makes no difference if you're beginner or not.