I stayed at Valeska's for one month. She was super responsive throughout the stay. Anytime there was an issue it was resolved in 24 hours or less.
Her building is quiet. I rarely heard or saw anyone during my month there.
I didn't think to ask if there was an elevator but there is not so I had to haul my stuff up and then down a few flights of stairs.
I missed the lack of natural sun light. The apartment faces another building so the windows have a sort of privacy type shade under the blinds.
Overall it was a pleasant stay. Valeska is great and she'll go out of her way to make sure you enjoy your stay.