How can marmite chocolate possibly exist in the world? With celery as a principal ingredient? It literally tastes like normal chocolate dipped in marmite, which means it's about the best way to experience marmite possible but a total waste of perfectly serviceable chocolate.
If even that wasn't bad enough, though, the marmite after-taste outlives the chocolate for some five minutes. If the chocolate is a welcome house guest, polite enough to leave early, then the marmite is a vicious scabies-ridden squatter, squeezing out black formless babies ten a time whilst they wait for a council flat to use as a spawning pool.
It's not good, is my point.