Monoprix is a good size supermarket. They offer groceries and bakery at downstairs and pharmacy and clothing at upstairs. They have a really good selection at pharmacy and I got some skin care items based on a recommendation of my French coworker. I did not get to try the bakery, however I got some cheese and smoked salmon and had them as a snack back at my hotel. I think prices are fair and people are nice. It is less than 10min walk from the Marriott.