We're going out to dinner in a while, so it will be put to the test. Jake always barks when left in the crate, and Jefferson pees in his crate. They always have, no matter what we've tried behaviorally.
Ben is fine in his crate.
So we'll see. I plugged it in, and its in their room, pheroming the heck out of the place. The dogs have their own common dog room, each with their own big crate.