We loved the flat - it's small but beautiful. As in the description said, you can easily walk to the city center in 20min.. We visited Praque for one week and walked literally everywhere: Petrin, Vysehrad, Letna.. You will find supermarkets, shops and bars in walking distance, too - and, of course, tram stations as well. Everything was fine: Lovely city, lovely flat, perfect vacation.
P.S.: It's really not a problem to get the keys. You will receive perfect directions via mail and the place is -tadaaa!- in walking distance.