We stayed as a family of 6 (2 adults, 4 kids, aged 7, 4, 2, 0) and had a great time, with simple active communication on the flat.
It is a good location, walking distance to multiple Metro stations and 1-2 blocks from many shops, restaurants, etc.. There is a working elevator, although quite small. The unit is on the 1st floor so there are some stairs and parking is not included. There is metered street parking available down the street as well as a garage 2 blocks away (rather expensive though).
Our kids loved the bunk beds and we loved the tall ceilings and no TV! :) It is a very quiet part of town and we would easily return again for another stay when we visit Paris!