I just finished this project but my backsplash was being replaced at the same time, so I cant help with that aspect. Initially I went with a GE in-wall Z wave outlet due to the location, but I rerouted the wiring into the cabinet where the Microwave is plugged into. Then I replaced the controller that came with the kit, with a Fibaro RGBW controller. You can see my posts in the fibaro device type (linked above) with the issues Im having. Im sure that will get fixed soon though.
Heres my solution for a no switch install (Wife requirements):