Bernard's apartment was fantastic - perfect space for 2 people! The apartment had great Parisian charm and was in a great location in the 6th arrondisement (walking distance to lots of shops and restaurants, as well as Notre Dame, the Louvre, Musee d'Orsay). The building is on a quiet street right off the Seine so it was quiet at night, yet just a few blocks away from bars/cafes if that's your scene. It's also close to subway stops so easy to get to other areas of Paris. Olivier, Bernard's associate, was fast to respond to messages, met us at the apartment with the keys, helped me bring up my luggage up the stairs, showed us around the apartment and answered any initial questions we had - he was great!
Despite a heat wave during the summer, the temps in early September were in the 60s and 70s, so no air conditioning was needed since it was very comfortable at night, but there were some fans in the apartment if needed. The apartment is on the 3rd of a walk-up building (no elevator) so just note that you will need to go up 2 flights of stairs.
I would definitely book this place again when I'm back in Paris!