TL/DR: Perfect room for a young solo traveler or couple looking to stay comfortably in the centre of Prague on a relative budget.
Alex's business partner David checked me, provided me with a map of Prague, and circled all of the main tourist sites to see.
Alex's room is situated in a 10-bedroom, 3 bathroom palace of an apartment. The bedrooms, which lock with keys, are rented out on airbnb in a hostel-esque fashion. I shared the apartment with Americans, Argentines, and many others. Each guest/couple is greeted by a giant double bedroom, this one was bout 18-20 square metres. The ceilings are as tall as the room is long, making it a giant cube with 4 metre tall windows. I chose this room because it was centrally located and very reasonably priced, but it ended up being more than I could have hoped for. Comfortable bed, clean bathroom, great shower, literally steps from the most popular destinations (though much of Prague is walkable). The hostel vibe is good for young people, as I enjoyed sitting around the kitchen table sharing a beer and chatting with the host and other guests. Everyone respects each others space, and Alex and David are usually around to make sure everything is running smoothly. The apartment is cleaned regularly, and it was in immaculate condition throughout my stay. All essentials are included, and the wifi is quick. Overall, highly recommend and would stay here again.