This unit is conveniently located just steps from the Rambuteau Metro station on the 11 Metro line. We were unaware that the 11 line has construction and is not connecting to Chatelet through the end of 2019, but we found easy solutions to connect. It is easy to walk a bit further to Etienne Marcel station and have easy access via the 4 Metro line also.
The size and layout are perfect for larger groups (we had 2 couples and an 18year old) - even with the one couch turned into a bed in the living space, we had lots of space. The unit is a first floor unit in the back of the building with only one window facing a courtyard where the trash collection is for the building. We traveled in May, and it was a bit damp/rainy. The unit does not have air conditioning, so I'm not sure what it would be like in the hot months. The unit did have 2 large floor fans to help circulate air. All amenities were provided for, and the unit was very clean.
Louise also made available an offsite location for us to store our luggage on our check-out day (additional cost) so that we could make the most of our last day in Paris. Louise was very responsive, even when I notified her that the one toilet was dripping.
I would recommend this unit to anyone wanting to stay in Paris. You can't beat the value - especially when trying to accommodate a larger group.