Mychèle was wonderful and I highly recommend her place, if you get the opportunity to stay there.
Mychèle is just amazing as all of her positive reviews. She reached out as soon as I booked (months in advance), and was always available whenever I reached out. She was always very gracious and extremely pleasant to be around, during the limited times that I saw her. She is definitely a super person and I can see why she is a super host.
The location is in a very nice and quiet neighborhood. It was extremely safe and I was able to walk to many places and the Loovre is very close. I would also walk to the Eiffel tower, but that might be too far for some people. The only thing that I would mention for solo female travelers is that later at night there are not many people around. You might see one or two other people on the street. I never felt unsafe and I don't think the area was unsafe, but I could see being on the street with only one other person being uncomfortable or awkward. I would just suggest using a taxi to avoid this situation if you would feel unsafe.
The listing is as described and as it looks in the pictures. I was expecting something more out of the Harry Potter books (bed under the staircase), so I was pleasantly surprised. The room is small but I had no problems (it's labeled as "ideal student apartment"). It reminded me of places I might stay in San Francisco, but bigger than some of the places I have stayed in the Bay Area. I'm 6'2" and a little over 200 pounds and I felt like the bed worked for me. Obviously, it's not my California king, but I fit on it and slept well. My feet did hang over the edge, but I could have made adjustments. Plus, if I curled up I stayed on the bed too (Initially I was worried that I would fall off, but I didn't). Mychèle makes perfect use of her space and I really enjoyed her decorations, which I felt were inviting and pleasant. The bathroon is narrow, so it might make really tall people 6'4"+ or people with a few extra pounds feel claustrophobic. My knees would hit the wall when I needed to sit down and use the toilet, but I just adjusted and had my legs spread wider than normal. This was not a problem for me and the bathroom was much larger than I had expected (it was really long and narrow). I was just in Costa Rica a few months ago and the bathroom in Jaco (not Tamarindo) was about the same size as Mychèle's tub, plus, Mychèle has hot water (been traveling to Central and South America lately, so I thoroughly enjoyed Mychèle's hot water).
Paris has many good food options, which I took advantage of every day. However, I am a diabetic and I don't normally eat the foods I ate while I was in Paris. Unfortunately, my stomach did not agree with my food choices and as a result I had to use the restroom more than I would like to admit. Even though there is only one bathroom, it was always available whenever I needed it.