The flat is a professionally run accommodation. I have unfortunately met neither Jana nor Jan. Check-in is very convenient: key can be collected at any time from a secured box. The check out is somehow less flexible: the place has to be vacated at 10am at the latest.
We travelled with a toddler: a baby bed and a high chair have been made available at no extra cost. The shower drained was clogged when we arrived, it was fixed within a few hours.