Sixtine's place is a great spot for exploring the 9th and 18th arrondissements of Paris on foot. The apartment sits on a side street in a very pedestrian-friendly neighborhood which is just steps from Montmartre, Sacre Coeur, Abbesses, and Pigalle. It's also super close to a number of metro stations (assuming there's no strikes!) which makes getting elsewhere in the city fairly painless.
The apartment is well set up, has all the requisite amenities, and is ideal for one or two people. Sixtine was a very responsive and flexible host, which is appreciated.