Wow - what a perfectly central location!!! Many major sites including the Louvre, Notre Dame, and D’Orsay within reasonable walking distance, but everything else easily via metro and trains. Pharmacy for COVID tests and grocery store are a 2 minute walk. Restaurants are everywhere and the big shopping mall is a 10 minute walk away. Be prepared for traffic and city sounds, but this is expected in such a prime location. As is common with classic buildings like this, be ready for stairs or patience for the tiny elevator that barely holds 2 people (or 1 and a suitcase).
The 3 bedroom layout worked well for 2 grandparents in the master, parents in the middle bedroom, and 2 teenagers with separate beds in the 3rd bedroom. Just be aware that us parents had to walk through the 3rd bedroom (to our teenagers despair) to get to the bathroom/shower, or we had to go through the living room and dining room to get to the bathroom/shower near the master. This is a minor inconvenience in a huge apartment where everyone could lounge and spread out, filled with homey books, games, and decorations that made it feel more like visiting a friend in Paris than a hotel experience.
For someone on a budget, this worked out for us because we could share the cost with the grandparents. Split in half, it cost about the same as a nice hotel but with all the comforts of home. However, the hosts really made the experience special - they were so helpful and responsive! We had several unusual requests that they were very happy to accommodate. Book with confidence and enjoy!!!