We loved the apartment! It was spacious, bright, beautifully renovated and decorated. (I especially loved the lighting!) (A bit noisy on the street, but with the windows closed, the sound was blocked.) It is in a great location for tourists, but it ended up being convenient for me as well, an easy walk to the BNP Richelieu and just a couple of metro stops to the Arsenal bibliothèque and the Mémorial de la Shoah, where I was also doing research. I was working, but my son and his friends (college students studying in Rome this semester) stayed with me for part of the time. They loved how close we were to museums, shops in the Marais, and other sights. They had initially planned on staying for only a couple of days, but were so comfortable they ended up staying with me for the whole week of their break--and cooked a gourmet dinner for me one night in the kitchen.
There were some small caveats: We only could get one key (which required coordination since we were never coming and going at the same time); the pillows were not the best, which was a bummer since everything else was wonderful; I also bought my own blowdryer, since there wasn't one. Biggest problem was the steep sloped stairs of the very old building, which made dragging suitcases up and down a bit challenging. Those with mobility issues--or really heavy luggage--should be aware that the stairs are hundreds of years old, narrow, and winding. While the apartment had almost everything, since I stayed for nearly two weeks, it would have helped to have a dresser or shelves for clothes in the front bedroom. Because it is a shopping and touristy district rather than really residential, outside of the FranPrix or G20, you had to hunt a bit for places to buy good produce or markets. (Very expensive shoes, however, are right next door!)
These are minor quibbles. It is a gorgeous apartment, comfortable, really clean, HAPPILY smoke-free, and had almost everything we needed for a wonderful stay. The hosts were prompt in communicating even for minor things (I needed extra towels), and did an additional cleaning in the middle of my stay, which was great. I also appreciated the attention to details, like filling up the coffee pods and leaving a bottle of wine on arrival. The service fee was high, but they made good on the service end of things. I am not exaggerating when I say that the apartment really made the trip for my son and his friends, none of whom had spent much time in Paris as near-adults, but fell in love with the city on this trip. (It was a delight to spend so much time with them.) We weren't on top of each other and that made a big difference. Thank you!