WOW!! This thing is amazing! Putting it together was a process in itself, but it wasn't too difficult. Then I turned it on. It was like a cyclone in there! All the debris on the bottom of the tank just swirled up and filled the whole tank, but after about ten minutes it was all gone. Just like that! And it is SO quiet! It kept getting air bubbles in the tank and sputtering a little so I searched until I found the air bubble in the intake tube and tapped it out. Now I just hear some faint running water, like someone else in the building is taking a shower or something. I can deal with that kind of white noise! I am so glad I got this!
FYI, I bought it at http://www.bigalsonline.com for about $75.

