The location of the apartment is amazing, about 2 blocks from Jardins de Luxembourg and about 3 blocks from the Number 4 metro line that gets you close to many of the main attractions in Paris. There are also plenty of restaurants, bakeries and shops nearby.
Guillaume was very flexible with check-in / check-out and the instructions for getting into the apartment were very clear. Guillaume also was very prompt in replying to questions. Great experience!
The apartment itself is charming, with 3 separate bedrooms and a very nice salon (living room). The two drawbacks: (1) it's but pretty old (creaky floors, old bathrooms and kitchen) although everything is in working order and the kitchen is well-equipped; (2) it's on a pretty noisy street (the windows do a surprisingly good job keeping the noise level down, but in summer when you want to keep the windows open at night, it can be an issue).
We thought these were minor drawbacks relative to the great location and the great service. Overall, we highly recommend this apartment.