Yes, Sheerstone may scratch over time, but so does marble and most natural stone. In fact if we were to put glass or even a sheet of stainless steel down these would also scratch. Use common sense – i.e. use a chopping board, and avoid dragging heavy items across the surface.
However, with proper care, this should be minimal. Getting the applicator back once every couple of years can freshen it up and make it look new again – with no need to recoat the whole bench.