A very nice appartment: clean, centrally located, underground station nearby, restaurants/pubs, shops, supermarket in walking distance, relatively quiet.
The hosts were very kind and thoughtful and even offered to store our luggage until we could check in. The check-in with the Klevio app was very easy, but you have to make sure your phone is charged at the end of the day. (There is Wifi outside the building in case you need it.)
The furniture and facilities are simple but sufficiently. The fold-out mattress on the couch is not as comfortable but ok for a couple of nights.
Be aware that there are a lot of stairs as the appartment is on the 3rd floor.