I would definitely recommend staying at Alex & Inna‘s apartment!
It was very clean, spacious and well equipped. It’s in walking distance to all the most important sights in Prague and thus perfect for a weekend city trip like we had. Despite the central location of the apartment, it was very quiet during the night.
Communication with the hosts was uncomplicated. It was however not them but a friend (I assume) who let us into the apartment and gave us the key. Unfortunately, she spoke very little English and (even though she was quite friendly) the check-in and showing-us-around - process felt very rushed (it would’ve been nice to talk to the hosts personally, maybe get some suggestions about what to do in Prague, where to eat&drink etc.)
But all in all I would definitely stay at Alex & Inna’s place again!