The apartment was absolutely perfect - stylish and incredibly well laid out - the use of space is great and it has everything that you need to live there for a short stay or for longer. Stephanie and Herve were kind enough to meet us at the apartment and even to carry our bag up the stairs! They talked us through how to use everything and were easy to contact at every point during the rental process, and they had also written a lovely welcome message on the blackboard for us :)
The air conditioning worked wonderfully (and was very useful for the week we visited!), the shower is very nice and despite that the apartment is located centrally in a lively neighbourhood, it was also very quiet inside. Location was also great - we could walk to most of the places we visited, including the Louvre and Notre Dame.
Please note - As mentioned in other reviews, due to the stairs and the elevated bed, the apartment wouldn't be suitable for people with reduced mobility, but I think Stephanie and Herve's description also makes this clear.
In summary, we had a wonderful time in Paris in Stephanie & Herve's apartment, and we would love to stay again!