If you are looking for a stay in Paris where you really feel like you are living like a Parisian, I recommend Claire's flat. It is less than a ten minute walk from the Javel Metro and RER C line, a close walk to the Seine, and lots of interesting restaurants and stores nearby, notably some good Lebanese grocery stores and cafes. I was taking a class at Le Cordon Bleu and this is also a very close walk.
The flat is cozy and has a terrace! What a pleasure to take coffee on the terrace in the morning. You have a fuil kitchen and shower with a good heat and powerful water pressure. The bedroom is cozy and has a very Zen vibe. There is also a couch, TV, and a table for eating or writing.
Claire is super-communicative and will go above and beyond to make sure your stay is comfortable and that you have everything you need. I would definitely stay here again for my Paris visit.