The flat was perfect for a family of 5. It is good for those who are travelling with big luggages. Both my parents slept on the ground floor while my siblings and i slept at the basement.
It was partly my fault to forgot to ask Claire about the ventilations for both floors and only realised it when we met Claire on our last day in Paris as we couldnt meet on the first few days.
Other than that, it was a good location where food and placed to visit are within walking distance. You can save lots of cost if you dont mind walking a bit further to the Eiffel Tower while enjoying the city itself.
We felt like home staying in Claire's apartment. Everything feels so homey and beds provided were comfortable as well. We cooked a bit in the apartment and utensils and pans were provided.
Claire is a very good host as well as she allowed my family to wait a little longer until it was almost time to get to the train station. If you are taking the train from Gare du Nord, it is only 8 minutes away with a taxi.
I would definitely recommend anyone to stay here while you are in Paris. :)