Product review (4 stars): Read this before installing
I bought this disposal to replace my old GE disposal that shook the counter when I ran it and finally died.  Wow..whisper quiet compared to my old one and looks like it is made well.  For $61 and free shipping what more could you ask for.  I threw a few whole carrots down there to test it and went through them like Oprah goes through cupcakes. I give it 5 stars for function.
My only complaint is installation.  When attaching the hopper to the upper unit you must put on a rubber "cushion mount". If this cushion mount is placed too high you will never get the hopper to connect.  The instructions are very unclear about this. After struggling with this for 30 mins. and using a few choice words and still not getting it I called customer service and they told me that they get this complaint all the time. If you get it all the time.....maybe you should FIX the wording in the  instruction manual.  I know it's a wild idea..but.
Anyway, what you want to do is NOT shove the "cushion mount" to high on the upper unit. It must be low enough to cover the tiny groves on the bottom lip of the "sink flange" (diagram 3g), only then can the hopper slide up far enough to lock in to the "mount ring" slots. When looking from underneath at the sink flange you must only see rubber, not the little groves on the plastic bottom of the flange. If you can't get the hopper up far enough to lock into the mounting ring you will know what I mean.

Other than that I am very happy with the disposal and it works great and is very quiet.