Our review is most useful for those travelling with small kids as we were with our toddler. Charles' place is very clean and be prepared to leave it the same way you get in it as this is extremely important to him. If you plan to cook, make sure to check the oven works in front of Charles so you get how the knobs operate and that the wi-fi works in front of him as well.
We slept in the living room on the fold out sofa while our baby slept in the bedroom in a baby cot - it worked out very well. Charles was very accessible. The location is great - close to a supermarket, Eiffel tower, restaurants, parks and the metro.