We had a very happy stay at Charles' apartment. It is situated in a very pleasant courtyard, set back from the road, and is very stylishly and comfortably furnished. Charles was a very hospitable host, providing us with wine, homemade jams and provisions for breakfast. He even very kindly sourced a fan for us as we were staying in Paris during a heatwave. The flat is on the 4th floor and like most Paris apartments there is no lift, but that wasn't a problem for us at all. If you want to explore Paris, the area has good transport links and is a short walk from Montmartre. We've already decided that we'll go back in the future - we look forward to our next visit!