Pre-made salads and sandwiches for take-away on pick-up-and-get-back-to-work lunches in the front, and a combo of small two top tables and long communal tables in the back -- Le Cartet appeals to many. I've spent a decent amount of time at Le Cartet. It's a naturally-lit, airy, above street space, where solo business guys on their laptops nestle up next to brunching felines on one side and a young family with a highchair on the other.
Service can run at a snail's pace. Attempt to catch the server's eye or get ready to wait a while for an order to be taken or the bill to arrive.
Coffees are fresh, juices are fresher. The ham and eggs breakfast is okay - a couple of pieces of thinly sliced salty ham and eggs scrambled, boiled or poached. But what makes it worth it? The duck fat fried potato wedges. They're a show stopper. I'd come back just for those!