This great apartment is very close to the Convention metro stop. From the apartment to the Metro is probably a 3 or 4 minute walk. If you are taking the metro to the Eiffel Tower, for example, it takes a train switch and about 30 minutes total to get there.
The apartment itself was clean, and even though we arrived late (6pm), Max gave us directions to get in the building and get the keys.
We spent a lot of time searching Airbnb for our family's needs. So my comments may not apply to everyone. We had 2 adults and 3 teenage kids.
There is a foldout couch on the main floor - that folds out to a full size bed.
There are 3 beds downstairs ( a full and a twin next to each other - and another twin in the closet/storage area.)
To get downstairs, there is a metal spiral staircase - which works fine - but can be difficult carrying large luggage up and down.
In the main floor, there is 1 bathroom for the whole apartment and a nice kitchen area - with a mini-fridge.
Our only minor issue was there was no washing machine. There is a laundrymat around the corner (on Rue Fourcade - self-service - open at 7am until 9:30-ish) I was told the washing machine had broken - which is no big deal - except I chose this Airbnb because I needed a washing machine in Paris. If I had been told in advance - I would have made other arrangements for laundry rather than messing with a laundromat at 7am. Again - it's no big deal - but if you know you need a washing machine at your apt - make sure you confirm that one is there before you book. Or - just use the laundromat.
Other than that one glitch - it was a great stay and I thank Max for the apartment. We had a great time.