It looks like this.
It's been done now for a few years (5?) and it's holding up really well, but there was lots of extra effort required to make sure the seam between the counter and the backsplash was watertight. I had to make sure that I got enough product in the seam to waterproof it, but not let the squeezeout take over and make a friggin' mess. I cut a very tiny opening in the caulk tube, and just did a very small amount at a time, pushing very hard to make sure it filled what little gap there was Then I sealed everything real good after a few months, and I reseal every year or so.
It would have been a lot easier with even a 1/16" spacer between the 'splash and the counter.
(edit, those are crumbs and stuff in the caulk, not bubbles. The camera picks stuff up the eye can't see!)
