I've just spent a full week in Lenka's Johan studio. The location was perfect, all of the lesser town is around you and every visit to the old town is simply a lovely stroll over the Charles Bridge. You're right on it. I spent the whole week walking around beautiful Prague and only used transport for the airport. When I arrived at about half past nine at night, a lovely young woman was waiting to meet me, show me the apartment and talk me through the kind of things you'd want to know - money exchange, best pubs, restaurants, must see's and best timing of any visits. The apartment is lovely - a comfy bed, you can sit at a table on the balcony or in the room, nice powerful shower, good sized fridge with freezer compartment and cafetière. Wi-fi fast enough for streaming music and video. A real home from home. A great bonus is the Lokal restaurant across the road, they serve excellent authentic Czech food at good prices, the menu changes daily and the Pilsner is the best! I had a great holiday.