Product review (4 stars): Very Quiet and Vibration-Free
I bought this model to replace a Waste King disposal unit that leaked due to corrosion. This one is at least 80% quieter, and there's very little vibration. My old one use to shake the whole sink after 5 seconds of operation. This one stays quiet and vibration-free, even after running for 30 seconds. I like that this one comes with a metal mounting bracket instead of plastic/PVC. It was fairly easy to install, but in my experience with DIY plumbing, it's always an unpleasant mess. No special plumbers' tools required, but you will need to have some plumber's putty ($5). This unit has two wire leads, no plug. If your old unit has an electrical cord that plugs into an outlet, you will need to be able to reuse it or buy a new short appliance electrical cord ($8). You will also need two wire caps ($1). I also had to buy an extension PVC tube ($3) for the drain, because the one that came with this unit was too short. I think this is a possibility with any model, and just depends on what your pipes look like under the sink. Overall, it took me two hours with my limited plumbing experience and one trip to the hardware store to complete the replacement.