We had a nice stay with our 1.5 years old son for a week.
Apartment has a great location, it's in 10 minutes of walk to Chatelet (main metro station + big mall). We rarely used transport as everything was close. The place is very quiet and very bright (windows in both rooms).
It's well equipped, with good internet connection, elevator (which was handy for our stroller, though a little bit narrow).
Overall it's highly recommended. For families with small babies there are few things to be improved, but overall it was great.
Thanks!