Marc and Rumi's apartment worked really well for my needs as a solo traveler and my travel style. The space is quite compact but seems to be a typical size for a Paris studio. It has a raised bed that gave the apartment a more spacious feeling than a hotel room. Plus, you have the benefit of a kitchenette and a washing machine. The location in the 16th is a great base for exploring popular Paris sights - the Eiffel Tower, Arc d'Triomphe, and Champs Elysee - and two metro stops are within a couple of blocks in either direction of the apartment. There is a FranPrix at the end of the block for groceries. I felt very secure; there are two locked common area entryways and an elevator to reach the first floor.
The neighborhood is very walkable but be aware that the apartment is almost on the ground level (first floor in Europe, second floor in the U.S.) and faces the sidewalk. From the windows you see others walking. They may see you, too, if looking in your direction and the shades aren't lowered :) The apartment has exterior metal shades that can be lowered to completely cover the windows, as well as Roman shades inside for privacy. Street noise filters in through the windows but it quiets down at night.
The bed arrangement is quite ingenious; it lowers from the ceiling on glides. Even when lowered it doesn't reach the level of a typical bed (it rests just above the height of the dining chairs). There's a step stool to assist with getting in and out of bed. If you have any balance or mobility concerns, this is not a bed I would recommend using. There is a standard single day bed that doubles as a seating area when the bed it raised. When the bed is lowered it is adjacent to the daybed, making daybed access challenging. If there's a second or third person sleeping in the daybed, it's going to be an extremely cozy fit.
The decor is simple, tasteful, and functional. Since it was just me and my luggage I felt that I had plenty of room to spread out and relax. There are a lot of lights, making the place feel airy, homey and bright, although two or three people staying in the same space may feel differently. The top of the washing machine in the bathroom doubled as counter space for my toiletries and the bath towels with nice and thick. There were hooks inside the bathroom door to hang towels, and additional hooks in the kitchenette area for outwear and shoulder bags. There is a closet with hangers for larger and bulkier items.
The kitchenette is convenient but extremely compact. There is no counter space, unless you consider the top of the two-burner stove. If you cook something you have to very careful about placing dishes on a hot surface. I just used the microwave so that wasn't an issue. Dishes almost have to be washed, dried, and put away as you go along, as the dish rack is in the sink, leaving only few inches of open sink for washing.
As noted in the beginning of this review, as a solo traveler the apartment space and amenities were great for my needs and time in Paris. I really appreciated having Marc and Rumi's assistant meet me at the apartment to show me how everything worked. Marc and Rumi also helped me arrange airport transportation at rates comparable to a taxi or Uber. Both drivers were prompt and courteous.
My experience at Marc and Rumi's is an easy and simple way to "live like a local." I'd definitely consider staying here again as a solo traveler.