Many things were great: the apartment has south and west-facing windows, and so it's flooded with light in the morning and had wonderful views of the sunset in the evening. The kids' room is delightful. And one is quite proximate to rue Montorgeuil, which has a great array of restaurants, epiceries, traiteurs, and so on.
There were however some hiccoughs to start. Some weeks after my reservation was accepted, Tiffany asked to cancel the initial days so that she could use the place. Because my family was arriving in Paris later than I was, I agreed and booked a hotel for first days. But Tiffany had her place cleaned in the afternoon that I moved, so I had to leave my hotel five hours before I could use her place. And though the listing said "crib," the crib wasn't present and had to be brought from elsewhere.
I don't want to overstate this complications: I did after all agree to the change in reservation (in part because I didn't want the whole reservation cancelled). But the lead-up to arrival and initial settling-in were not as smooth as one might like.