Great response, intonation, flexibilty in volume and timbre, pleasant mouth feel, easy subtone and altissimo, very durable, easy to see for placement on the mouthpiece and being slightly rough stays in place on the table. All of this is really good and, so far as a package, beats any other synthetic reed that I've tried.
But the sound is not for me - it's big and full - but bright to the point of being buzzy and kazoo like - and this is supposed to be the darkest FIbereed ! I'm sure many people will like this sound and I can see its attraction. As a consolation I find the this tenor reed sounds and plays very, very well on alto