Mathieu's flat was perfect for exploring Paris. It's central to everything. The flat is surrounded by many bakeries and restaurants so that you don't even have to go anywhere. It's also close to the metro. It's very easy to walk to the tourist attractions. And during the holiday we were there, it was close enough to tourist areas that there was plenty of options for open restaurants early in the morning until late at night. There is even a grocery store only steps away and a great little restaurant about five meters from the door. Seriously, you can't find a better location.
The flat itself is simple and well thought out. It has everything you need, organized very neatly. We like to cook and eat local food and we were easily able to do that. It was almost silent in the flat itself. Mathieu provided some nescafe pods for us and even purchased some orange juice and put an apple in the bowl on the table. We didn't use everything he provided but it was greatly appreciated.
To check in, Mathieu sent me instructions on finding the flat from the airport because it was my first time in Paris. When I arrived there was a personal note, which was an appreciated personal touch. One thing I loved was that Mathieu was available to answer questions, but he never imposed or had any crazy rules or anything. It was just easy and fun, and I would definitely look to stay here again on another visit.