Acapella Valve

Good shape

I've used a different acapella which was unreliable. I never question whether this one will work - it always does!

Directions were very basic, to say the least. Could have been more detailed or descriptive. Especially since could cause damage to user if done improperly.

I've used another a capella, and it would work at times. So far, this has been great! Consistent, dependable, easy to use and clean.

I've been using these for many years. I have gotten ones that work very well, and ones that don't. I've even had a couple that only worked when held upside down. I would tell those of you who haven't found one helpful to try another one. I don't know if the supplier offers a money-back guarantee, but given the price and the frequency of problems they should.