Polystone is crushed granite in a resin.
It is maintenance free, seamless (most L-Shapes are literally all one piece), will not stain, non-porous, and it never has to be sealed. There are over 60 Colors and they come with a bevel or full bullnose edge at NO EXTRA COST.
The kitchen and bathroom sinks are truly molded and one piece with the polystone countertops. Every other product will take a pre-made sink and seam it in.
One of the greatest advantages of PolyStone countertops is that they are completely repairable. This is a great feature for those unexpected accidents that with most products you would have the expense of replacing the entire countertop.