PROS: The apartment is very very clean and nicely decorated. The location is centralized and close to many shops, restaurants and attractions (Louvre, Place Vendome, etc.). The bathroom was spotless and the water pressure in the shower was great.
CONS: The apartment is on the 6th floor of an apartment building. The stairs spiral all the way up and are therefore VERY narrow. Once you make it to the 5th floor, you need to walk to a back hallway and up the last set of stairs. My husband and I are athletic, and were exhausted by the time we got up the stairs. Our main concern once we made it upstairs was our safety in case of a fire. There was no emergency exit we could go through (at least none that was clearly displayed). Once we arrived the studio was MUCH smaller than we expected and very hot. We only had two large backpacks and 2 small personal bags, and there was barely any room to walk once we put our things down. I am 5'2, my husband is 5'10 and we were too big to walk around the studio at the same time. We turned on the AC but it took more than an hour before the apartment started to cool down. There is one window, but it has metal bars on it, so that would not be an option as an emergency exit either. Although there were towels in the apartment, there were only two for our entire stay. There were no hand towels or washcloths/hand towels either.
After spending the night there, we decided we would feel much more comfortable staying at a hotel. I have had great experiences with multiple AirBnb's/ home rental companies in various countries, and we are pretty easy going when traveling- but this one just wasn't for us. We were looking for a space where we could be comfortable and relax at the end of a long day of sightseeing, but it was just too crammed and not worth it.