Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Quieter than a whisper
Review: Had a unit that was extremely loud and shook whatever surface you put it on. Husband looked up this model online and saw the great reviews so we went and picked one up as soon as we could. Since then, all we've heard is the bubbles breaking the surface. The pump has sound dampeners inside of it and is securely sitting in a rubber dome with feet. This design truly works! Can't hear a thing (and hasn't even vibrated itself off the self either). It also came with an air regulator since this pump can be used for any size up to 10 gallons, you can adjust for the smaller tanks. Highly recommend it!
