I bought 3 of these to use as a working centerpiece at a birthday party. All three blow different amounts of bubbles. One unit blows about five bubbles, one unit blows about fifteen bubbles, and the other blows only one large bubble. Even when all 3 units are lined together they do not produce a significant amount of bubbles. I am very disappointed! And yes, the motors are loud-ranging from annoying to "turn that thing off!!".