It is so good, you could easily use this horn to play in a concert and it can be very loud. If you have never blown a horn before, it requires at least a few 5-10 minute practice sessions to get a good tone out of it, a week to be able to blow very very loudly and weeks to months to play tunes that are pleasant to listen to. You tense your lips differently, to cause different vibrations which generate the sound. The longer the hose the more notes are possible, but the more difficult it is.
Great for protests, kids or if you are thinking about playing a blowing instrument but don't want to make any investments.
Polycaprolactone is very safe. Don't use epoxy because of bisphenol A.