I bought one of these about five months ago and I think it's great. When I bought it I thought it a bit better for me than the various alternatives – Dawkes were very helpful in the shop suggesting several mouthpieces to try and plying me with coffee – but since then the metal V16 has really grown on me.
To be precise I bought a Vandoren V16 Metal Tenor mouthpiece, medium chamber T7. It has a rich tone, full of character. It's reliable to play and it's quite an all-rounder. I use it for a jazz quartet/trio - where it is superb – you can get quite a classic sound, but I also play big band jazz and in a pub pop-rock band. If you only play rock, you might want something different but it works there too: it doesn't go thin at the top, like some pieces do, and has plenty of oomph and a nice edge if pushed. The tone is very uniform from top to bottom so I find I’m exploring the whole instrument in solos and not just sticking to a favourite part of the range.
It comes without a ligature but an inexpensive Rovner Star ligature (about £20) is fine if you don’t want the bespoke Vandoren one. I play it with a Vandoren Red Java 2.5 reeds and, to be honest, after the first few weeks I’ve not been tempted to try anything else.
Not a trendy brand, nor immediately exciting sound like some makes – but when you get to know it you find its hidden depths and unlike many pieces, it’s not a one trick pony.