I've got to agree with that assessment. I've got one myself and have been very disappointed with it.
I have found one that I do like. Its the RainMaker misting system,
http://www.cloudtops.com/misting_systems.htm. It's kinda expensive but the results are worth it. A buddy of mine that work in the Desert Dome at the Henry Dorley Zoo in Omaha got one for me. It's the same kind that the zoo uses.