Hi Josh I'll repost my trumpetherald response for discussion purposes: I have the all plastic version and it's the only practice mute I own. I got it over 20 years ago during my first trumpet foray. I haven't used stethoscope attachment in years. It's clunky and uncomfortable. I instead place an earbud in one ear while playing while using the mute (and sometimes use it to listen to a metronome). It's... okay. I wouldn't give it a ringing endorsement. I don't like how far it sticks out of the bell. I'm not fond of the intonation. If I had need to use a practice mute more than an hour or so a couple times a month, or if I had need to use it for an offstage warmup or something I'd seek out something better. As it is, I'll just keep using it because it does an okay job for something I don't need very much.
