We spent 4 days in Prague and the apartment was great.
The location is close to all the central main attractions of the city and a Tesco supermarket is a 5 minutes walk from it. The apartment is spacious, clean, has free wi-fi connection, all the kitchen utilities and was perfect for our family (2 adults & 2 kids) needs.
We also used the driving service from and to the airport and it was fast, accurate and affordable.
Bottom line - great apartment, good value for money, very good staff and customer service.