I have a similar dilemma, but after seeing a few photos on Houzz showing windowsill from the same material as the countertop, I'll be doing that rather than introducing another material. [Here's an example[(https://www.houzz.com/photos/palos-park-kitchen-renovation-contemporary-kitchen-chicago-phvw-vp~125229).

Well, turned out to be a non-starter. Our windowsill had to fit in a space no more than 3/4" thick, and the only soapstone I could find was 1 1/4" thick. So I guess it's back to marble.

Your fabricator should be able to cut it to 3/4" thickness. I have 1 1/4" soapstone counters, but they cut the backsplash pieces down to 3/4" thick.

Not all fabricators can hone down soapstone. I only found one while I was doing my soapstone countertops in Los Angeles.

No cons, other then soapstone is a darker material. Durable, non-porous, indestructible.