The good: Hosts were very friendly and communicative. The check-in process was incredibly easy. The apartment is convenient to the train station and a short walk to the metro. The dry sauna works great. Beds were comfortable. Apartment was quiet.
The not-so-good: It's a small, slightly awkward space. The apartment and building have seen better days. The pictures make it look bigger and nicer. But this wasn't a huge problem for us as we were out exploring Prague and not spending much time in the apartment.
The elevator felt a little sketchy. My husband used it to get the suitcases up the many flights of steep stairs. After that, we didn't use it again. I'm sure the elevator fine and that residents of the building use it all the time. But I could not bring myself to get on it.
But overall, the apartment was a good place to stay, and Alex and Kate were excellent hosts.