As a solo female traveler visiting Paris for the first time, I would definitely recommend staying at Perrine's flat! Perrine was very easy to communicate with, and very flexible with the check-in and check-out times. The description was very accurate in what the flat looked like and items provided for you.
The flat is within walking distance to multiple metro stations (closest one being a 5 minute walk) that easily take you to all the sights in Paris. It was in a great area of Montmartre, I felt very safe walking back to my flat after dinner/day trips outside of Paris (after 10pm). Also walking distance to markets, pharmacies, and multiple boulangeries (one right across the street!) Would definitely be a great option for solo travelers or a group of 2.