Go for the crepes, not the coffee.
I went with a friend, and we each ordered a crepe. I had the Dark Angel - a crepe with chocolate hazelnut and ice cream in the middle. These flavours naturally go quite well together, and were well matched by the crispy freshness of the enveloping crepe.
We both ordered drip coffee - it was late on the evening so I suspect the brew must have been old because it tasted terrible. Not worth your money. I decided not to down our for this however, assuming that most people are only interested in the crepes.