Product review (5 stars): It grinds things up
I was able to install the unit myself, (although it's a bit of a challenge if you've never done any plumbing before), and it's much quieter than the old unit it is replacing.  Additionally it's a little smaller, so there's a bit more room under the sink.  There's not much to say about a disposal, you flip the switch, and the grind stuff up.  This one does that, at least so far.