The apartment is on the 4th floor (counting ground floor as 0) without an elevator, lifting up a lot of luggage can be tricky.
Apart from that everything else was very nice. The apartment is very cozy. Klaudyna did a great job designing everything, it's very authentic and nice. The neighborhood is probably not the best looking in Paris, but it's fine, considering that everything's close including a metro station.
Very happy to have stayed at Klaudyna's place.