Very quiet tinny sound with this mute, so if you want to practice late, and not annoy the neighbours, this is perfect. I think you could play in a hotel room and not bother anyone next door. Also good for repetitive practice. Cons are the weight, you really feel it added to the violin, if properly fitted to bridge it is quite stable and has never come off before I meant it to!, It removes volume AND tone, so not advisable to use it all the time or you wont hear your mistakes so easily!