This is a very cute, cozy apartment with a terrific location. It's kind of small, so I think fitting a large family in would be a stretch, but it's perfect for a couple or perhaps a family of three (sofa-bed in living room). The kitchen area is small but wonderfully outfitted with everything you need -- I particularly appreciated the kettle and toaster, as well as all the plates, didn't use the pots and pans but they could be helpful to others. You have a Monoprix (French grocery store) one block away and a wonderful natural grocery about 3 blocks away on Boulevard de Bonne Nouvelle, and even better, the apartment is just a block off of Rue Montorgeuil, which has all these cute shops for bread, pastries (Stohrer, the oldest patisserie in France is there and it is worth it!), cheese, olives etc etc. Also a very fun and happening area to have a drink at a table on the street and do some people watching.
My two caveats for Yankel's place are: 1.) Make sure you are okay with stairs -- it's up several flights, which was fine for me, but if you have severe knee issues, it could be a problem and 2.) I arrived for the first time in the AM, which was fine, but I would try to arrive there the first time when it is light -- the interior hallway is totally dark, and so you need to flip on the switch, and perhaps a switch a few flights up. If you have to arrive very late at night, make sure to have your cellphone flashlight out to look for the light switches, those stairs are a little steep and you will want some lights.
That said, it's in a fabulous location, close to lots of transit, Yankel is extremely responsive (the modem pooped out while I was there and he came and got it fixed within about 12 hours), it's very charming and feels very Parisian, and it's extremely clean and tidy. Saw earlier reviews that the bathroom looked a bit tired and had water damage, but it was gleaming (although very small) when I was there in Oct. 2017.