I love this mute, maybe because I am a huge Miles Davis fan. In any case, if you find that you need a wah wah mute for a particular show/ensemble I would recommend this one. The sound is just magnificent, with much more character than other brands of this style of mute. The response is great across all registers (still resonates on low F#) and the intonation is superb. I do find that I need to pull out my tuning slide a few centimeters, but that is to be expected. I also shaved back the corks so that it would sit more snugly in the bell, but that is just a personal preference. A really great classic wah sound with lots of character and great fun to play!