Great location for 4 nights in Paris. The apartment is conveniently near a metro and walking distance to local restaurants and shops. It is above a few local bars so occasionally there was a bit of noise from the street but not too bad.
Up a windy staircase you'll find the apartment. Very clean with good bathroom and kitchenette. Smells strongly of cleaning detergent (almost like a pool) but i much rather a clean apartment than a dirty one!
The aircon is a free standing aircon that requires a tube to go out the window, so if staying during the warmer months you'll need to leave the window open to route out the tube. Not a problem since the days we stayed were not too hot.
Overall a great location and a clean apartment, and Guillaume was polite and responsive for the whole trip.