It is listed as a garden apt, which by definition is an apt on the ground floor of an apt building having direct access to a backyard or garden. Although it was very cute, this is a converted basement.
It states in the listing that you "may hear steps from the upper unit". You WILL hear them, and they will sound like a herd of cattle above you. In fact, if someone above you is sick and throwing up, you will hear this as well.
Unless no one is in the unit above, it is not a peaceful/restful place to stay.
The mattresses are beyond firm, so if you are comfortable sleeping on the floor, this will not be an issue for you.
We would definitely not return.