We booked Edgar's apartment because of its central location in the old town. We usually purchase a 3 day public transport card on arrival in a new city but we never got around to it because of the apartment's close proximity to all the attractions, cafes and shops.
The apartment building is very safe and secure and while close to the tourist heart of Prague, there was no noise to interrupt our sleep.
We also booked the apartment because it has a kitchen. It was a nice touch to find coffee pods, local beer and fruit on arrival but a few more basic utensils plus condiments such as salt and pepper, oil and vinegar would have been helpful. Overall, we enjoyed our stay in this very clean and spacious apartment in amazing Prague.