I've only been here twice, but I've had a terrible experience both times, so I've decided to never return.
Both times I went, all I wanted was some food on my way to work. The first time I came in, I order a crepe and paid for it. When I got my food, I was handed a croissant, even though I paid and ordered a crepe. I was too tired and hungry and didn't have enough time to be bothered to say anything about it.
The second time I came in, I ordered a crepe and a double espresso. The guy who took my order was clearly annoyed when I said I was ordering a crepe and it made me feel really uncomfortable because I just wanted some food before heading to work. I was given a single espresso when I paid for a double and when I said something about it, the woman took it back and made a new one. The new one I was given was just another single shot of espresso. I couldn't be bothered to say something again, so I ate my food and left.
Both times I have come here, I paid more money for what I was actually given and the service was terrible even though I tipped right when I was given my change.