I know what you're thinking, because it's the same thing I thought when I first saw this at Les Amis du Fromage.
But of course I had to get it, because bizarre foods are like a food-lover's version of bungee-jumping. The weirder / higher the better.
You know what? I liked it. We all did actually, and there were four of us tucking into this cheese + chocolate combo. There's a thin layer of crunchy parm in the middle, and while at first you only get it in texture, there's a little bit of cheese at the end. It mainly just tastes salty, which is great because salty chocolate is awesome.
I don't think I'll ever stop and say "maaaan, I could really go for some parmesan chocolate right now," but I'd definitely get this again; it's an edible conversation starter that's genuinely good. Way to go, Les Amis!