Shockingly, these were just so-so. A lot of effort goes into making the crepes, without much bang for your buck. The banana filling definitely needs something more - cinnamon or brown sugar, or perhaps some drizzled agave nectar. The chocolate sauce also doesn't really taste like much more than slightly thinned nutella - maybe some spices in there as well, and I'd thin it more with extra milk for a drizzly sauce. But still, sweet, and banana-y, and chocolate-y, so yummy.
It's hard to go wrong with crepes and Nutella, but I agree that something was missing. I sprinkled the bananas with cinnamon; that helped. There wasn't really enough chocolate sauce for four servings and I prefer the sauce to go inside the crepes. The sauce was also a bit thin. I think some whipped cream would be a welcome addition.