My boyfriend and I had a great stay at Gilles' place!
He didn't welcome us in person unfortunately, because he wasn't in town but he made sure we get the keys.
He answered very fast and the area is perfect for a sightseeing trip. Boulevard St. Michel gives many opportunities to go shopping and many nice little streets around the district. Jardin du Luxembourg is right next to the apartment and the Metro and also RER is not far!
Some bad aspects are for example that you can definitely tell that it is a smoker apartment and it was very dusty, so with a dust allergy not absolutely ideal.
But all in all we recommand Gilles as a host and his apartment!