Product review (5 stars): Mine was good. Very, very, quiet, with no vibrations
My wife wanted a QUIET disposal. My wife is now happy. We all know what that means.
Seriously, we've had this for several months now and it seems to be great product. I see some negative reviews and suspect they are legit, but mine has been great. I was able to re-use the old in sink (er-ate-er) mount so the install was really quick. It's a BIG unit so make sure you have enough space for it, and you may have to shorten a drain pipe or two (which is easy when they are plastic). The rubber drain baffle that sits in the drain to prevent stuff from splashing out, is placed in from the top (instructions were not clear about this), but it's great because it's so easy to remove and clean. It also stays put otherwise.