We just returned from a 9-night stay at Alex and Kate's apartment and we couldn't be happier that we chose to stay there. The location was perfect. We walked to just about every major tourist destination - the Charles Bridge, Old Town and Wenceslas Squares, the Jewish Quarter and Prague Castle. The Castle is a bit of a hike, so if you'd prefer the #22 tram is only a few blocks away and takes you right to the entrance. We rode the tram several times as well. We appreciated the mini mart around the corner for pastries, yogurt and coffee, and the little coffee shop for afternoon pick-me-ups. Highly recommend The Lemon Leaf, a Thai restaurant very near the apartment, and La Areperia, a little Venezuelan restaurant right around the corner. If we weren't having such a good time trying all the places to eat in the city we would have gone back to both.
Our check-in was painless and just as promised. We arranged for airport transport through Alex and Kate, and our driver gave us the keys as well as a local map and a layout of the apartment. The apartment itself was just as described and as shown in the photos. We really appreciated how the bedroom area (and one bathroom) is separated with a door from the living area. Although there were only two of us it was nice to close off the sleeping area if one person wanted to stay up later. The beds were very comfortable and the apartment was all over spotless. We used the washer and the dishwasher and were glad to have both.
In summary we would recommend this apartment to anyone visiting Prague.