Baconnaise is dubbed the "ultimate bacon-flavored spread" in its branding, but I like to call it "the ultimate vomit spread with chunks of fruit." That's just my first impression upon seeing it in a jar. Apparently, you can substitute it anywhere you'd normally use regular mayo. The difference is now your food tastes like the bacon fairy flew by and sprinkled some bacon flavor, nitrates and liquid smoke on it.
I've never tried it, but The Onion A.V. Club decided to taste test it by mixing it into deviled eggs. The gal who made the eggs commented that it left her hands smelling "like [she] just raped a prostitute with a slice of bacon, then ate an egg afterward."
After all the bacon-infused foods out there: bacon mints, chocolate-covered bacon, bacon ice cream - Baconnaise is probably the one most people would consider buying. Scary thought.