Got about 8 Kasa 3way smartswitches years ago.  They work great, but I get grief from my wife because they are white and I replaced black manual switches.  Since Kasa recently came out with black single pole smartswitches HS200-BL, is it a good guess that they will bring out a BLACK 3-way too.  I have tried all the other black 3way switches on the market and none of them work.