The apartment is really lovely! The location is a nice one and is convenient to bus and metro transportation. We did a lot of walking and enjoyed seeing Paris as pedestrians too. Lots of choices.
The 3rd floor walk-up (4th in US-speak) was a challenge, but we knew that.
Although the pictures show the steps to the 2nd bedroom with just a wall with no railing on one side and no railing at all on the other, it should have been more explicit in the description, particularly since the bathrooms are both on the main level.
Frederic was really helpful answering our questions and sending information about the surrounding area.