From previous reviews, there were some concerns (musty smell, steep stairs to bedrooms, hotter in the upstairs area with no A/C) that were all accurate. However, my family and I did not mind this too much and expected these things on arrival. The one negative that happened on our trip that was unfortunate was that the bathroom and shower kept flooding. With only one bathroom, it was very difficult for my family of 6 adults to comfortably use. The positives however is that Francois and Franck were so responsive to the problem and worked tirelessly the first 2 days of our trip to fix it. It was fixed and we enjoyed the last 3 days of our trip with no issues, however the bathroom was left damp and muggy smelling due to all the plumbing.
The apartment itself is in a great location in the heart of Paris in the Marais neighborhood. Everything was accessible and Franck gave us great recommendations on nearby restaurants, shops, and activities. He always answered his phone whenever we had questions. Overall, if it weren't for the plumbing issue our stay would have been stellar. I only recommend that more fans or an A/C be installed in the living room upstairs especially in the summer time.