I live with neighbours all around me and I think that they are very pleased with this purchase. The Cello Mute is a fairly simple but effective tool, because it dampens the sound of the cello A LOT! The only minus, is that it changes the general tone of the cello a bit (it isn't just a normal clean cello sound dampened, it is a bit different - but it doesn't affect the tune etc). But all in all it is a great muter, and i personally think that it does its job very well.