Many over here in the States love them for the money. I bought one each of the A5 and B5 facing/bore for A/T/B to test out for the heck of it (they are cheap!).
I find them a bit harsh and edgy, and the low end isn't as responsive or warm as I would like. Although they have virtually no baffle (actually a concave baffle at the tip), they sound like a quieter version of a high baffle, rock style MP to me.
Conversely, the older, now ersatz, Rico Metalite models (which were a higher baffle piece) had more warmth and a better lower end (albeit quite a bit louder) to my mind, strange as that may seem.
I suppose for the money they are a nice deal (the table, tip and rails are quite consistent, if not a bit thick in the case of the latter two), but I am not enamored.
I think the Morgan Protone is a FAR better, low cost, yet hand finished mouthpiece for just a bit more money-even with the limited facings choice- ie exactly one. 😉
Just one man's opinion.