Unfortunately, our stay failed to meet expectations, primarily due to lack of information and urgency.
First, know that this property is managed by a company and not an individual. I dealt with a different person every time. Second, know that this property is difficult to access. You will need to retrieve a key from a nearby hotel. For us, unfortunately, that process failed, and it took over an hour to get the property managers to provide a correct code to the hotel clerk. Next, you should know that the address provided has a near-identical address next door. Don't go to "4 bis". Due to train delays, we arrived after midnight and this wasn't obvious and caused further delays. Then, as others have reported, you'll go through 4 different locked doors and then up a tight staircase to the 3rd floor (note floor number, not in instructions) . The door is not marked so you'll need to match photos from your instructions to make sure it's correct.
Once inside, the unit is nice, similar to photos on the listing. If it's not clear from the photos, the bathroom in the first bedroom lacks a toilet, which is located adjacent to the front living area. The USB plugs in the rear bedroom turn off with the light switch, so be aware. Showers overspray substantially, so be sure to get extra towels to prevent a wet mess when showering. If you will be using the sofa bed, be aware that it needs to be closed in order to exit the front door. Beds were comfortable and linens were fine.
The location is only a block from Gare de Lyon, which we loved. It's on a nice street that's not too noisy at night and which has many good dining options.
The washing machine malfunctioned on our last day and we had great difficulty retrieving our clothes from it before checkout. Ultimately, this took over 6 hours to resolve and impacted the rest of our last day in Paris substantially. I had hoped for more punctual service from the host and staff.