I spent two weeks at Gwenaelle's place and had a great time. It is small but cozy, in wonderful Montparnasse, with a metro station just outside the door. Everything was perfectly clean. The room has all you need for your hygiene (toilet, sink, shower) and a fridge and two hobs so you can cook some light meals. Remember it is on the 7th floor, so lots of stairs, but you are rewarded with a big window, where you can see the sky, right in front of the bed. I never met Gwenaelle but she replied quickly to every email I sent and was always nice, polite, helpful and clear. Would definitely recommend.