I needed a replacement garbage disposal unit for my 17 year old unit that was kaput. This garbage disposal unit as the top rated unit by Consumer Reports.. I had the unit professionally installed by a plumber - he was able to complete the entire installation in less than an hour. The unit is bigger than the unit it replaced but it is much more quieter with just a slight hum that you can barely hear above the sound of running water. It is working flawlessly and has been able to grind whatever I needed - am usually careful about what I flush down the pipes. I expect this unit to last several years given the way it is built.