I did some searching on the internet before purchasing the Waste King.  It had good reviews, the plumber had not heard of this brand of disposal but liked the way it hooked up and thought it was good.  I do not use the garbage disposal much but when I do I am so happy that this disposal it so much quieter then my previous one.   I had to have a new one installed in my mothers house, one that was purchased from Home Depot, it was so loud and started to leak at a seam.  Some disposals will make the sink vibrate this one is very smooth.  I am very happy with my purchase.