Great flat for 2-4 people to share in a very cool, locals-y neighborhood in an outer arrondissement of Paris. Since it's in the 14th and a little far by walking from most of the well-trodden tourist 'hoods, I'd recommend signing up for Mobike or Ofobike, both bike sharing services that you can use through an iPhone app. Each day we found plenty of Mobikes around the corner from the flat on St. Marcel, and those bikes took us to all corners of Paris.
The kitchen was small but usable and I made breakfast a couple of times there, but hey, it's Paris - you want to go eat at one of the many bistrots dotting the bouelvards and rues of the city. However, I will say that the boulangerie (bakery) just below the flat is of an *excellent* variety. Boulangeries start to look the same after a while, but this one truly does stand out. All of the pastries were amazing (I favored the chocolat au pain and the eclairs) and you can expect fresh, warm baguettes in the morning. I'd stay again just for that alone!
The flat is clean, modern, and well appointed. The fold out couch makes a second bedroom, but I wouldn't count on also using that as a living room if you plan to fold it out. The bed takes up pretty much the whole room so it should really just be those guests' bedroom, not a common area you can use. Something really handy for us was the office which we used (along with the living room/dining table, before our friends joined us) as a mobile office for our business. The wi-fi worked great and there's a bluetooth speaker so you can jam out while catching up on emails. It's an interior facing flat so a little dim at mid-day, but not bad with all lights on and windows open. Plus, that keeps it cool in hot Paris summers (flats just don't have air con here). Trust me, you'll be happy about that when you're trying to sleep after a hot day.
Jean was incredibly helpful, and overall I'd recommend this place to anyone coming to Paris for your first or fortieth time. A++++++