We stayed two nights with Lenka and David and we couldn't have asked for anything better. The flat was impeccably clean and beautiful (3 beers, coffee, and tea provided), there was information about sights to see and restaurants to try (we tried Potrefena Husa Hybernska on their recommendation and oh my God!), and David even attempted to meet us at the train station and escort us to the flat (we didn't get that message and just went straight to the flat but it was still an example of the excellent service). The location was perfect, not too far from Old Town but far enough that the business bothered us. There was a little noise from the nearby train stations, and while that didn't bother me, one of my friends was a little annoyed. But overall, a great place to stay, and I'll definitely try to book with Lenka and David the next time I'm in Prague.