Cheapest Marriott in Paris, very close to RER metro station - 2 minutes walk, and a quick ride to the city center. Restaurants and shopping nearby - very convenient.
There is also a FANTASTIC grocery store on the way to/from Laplace RER station. The prices ate the best I've seen in Paris in my whole trip, and they open till late, get your cereal & milk there!
The Vache Noir Shopping Centre has good variety of food, esp Flunch. Free wifi at McD's too. However, go early as the complex closes early (9pm) as well as on Sun
The Courtyard by Marriott hotel is located in the dynamic area of Arcueil. Whether traveling to Paris for business or vacations, you'll enjoy upscale hotel rooms at the Courtyard.