Brick seems too porus for a back splash. You want tile or something that won't absorb the spaghetti sauce splash. Getting grunt out of the grout lines is enough of a job, having brick just seems like it would be a grunt sponge.
It is the current “Z Brick.”
The problem with it is that you can tell it is not full thickness brick.
The grout just doesn’t look “right.”
Before you get too far along, find an install to check it out.
Don’t be surprised if you are disappointed.