Product review (2 stars): It looks good, but runs bad.
I purchased this product because of the way it looked (all stainless steel and three speeds) and the competitive price which was much less than other brands.  It took me a while to have some one to install it.  However, I had found it to be much less efficient than expected. It vibrates to a point that I can feel the motion on the walls when it runs on high speed. I called the installer back for an inspection and wished he could do something to eliminate the vibrations. He checked out a few things and had come to a conclusion.  The fans appear to be wobbling when they are in operation. That is the reason for the shaking. I watched the fans turn and found that one fan wobbling more than another. I wish I had bought some other brand even for more money.