Fantastic communication from Cecile before, during and after our stay. She clearly let us know directions and also offered to meet us if we needed any further help.
Location of flat was perfect! Airport was roughly 1 hour 15 minutes by public transport (1 train with 1 swap) and costs around €10 per person (CDG Airport). 5 minutes from the Louvre and other museums, a funfair walking distance away, cafes, large supermarket (15 minute walk) and easily accessible by metro and bus. Walk to Eiffel Tower took us 45 minutes at a relaxed pace along the river.
The flat itself was very clean, spacious downstairs for 2 people, upstairs very cosy (mind the low ceiling!) with a comfortable bed. It's up 5 flights of stairs, as other reviews have stated, but you get use to the walk up fairly quickly. All kitchen essentials provided, lovely shower, iron and hairdryer also included.
Overall would recommend the flat for a short trip to Paris. We were very happy!