
I have one , with the extra chest strap, which I've never used ( the strap not the harness ) but I don't have a Houdini either.
If I was really concerned that my dog would try to wriggle out, I would opt for a Ruff Wear harness, expensive, but I seriously doubt any dog could get out of one.
I use the Ruff Wear if there's going to be lifting on the walk.