Andy's place is ideally located ; the flat is a few hundred meters away from one of Prague's largest city square, which make it very easy to travel within the city on foot (the old town is 10 minutes away) or by subway (easy access to two subway lines), and outside of the city (main train station 15 minutes away from the flat on foot).
The apartment was clean and very quite (no streetsound whatsoever - the fridge was a tad noisy but nothing that can't be managed).
Andy gave us a few tips around the city and was very welcoming. We very much enjoyed our stay.