If you don't mind taking you suitcases 106 steps up (without an elevator), and sleeping in an apartment under the roof without Air Conditioning in the summer, then this is a super central place in Paris. The entrance is in an pedestrian area, but very close to a metro stop (Etienne on line 4).
Parking at Les Halles parking garage is Euro 39 per day.
The apartment has one decent bedroom with a comfortable queen-size bed. Then there is another bed up in the attic, reachable via a steep ladder (no standing room in the attic). And if you push it, somebody could sleep on the couch in the living room, which is open-concept with a kitchenette and a dining room table. Furniture is IKEA style, and quite worn. The apartment needs maintenance: broken blinds, leaking dishwasher, doors that don't close, clutter of left-over flooring pieces, cupboards stuffed with cleaning supplies and therefore unusable. Of all the Airbnb apartment I stayed at, this one would rate quite low in terms of value for money.