The apartment is lovely - large, modern, cozy and convenient as well as full of kitchen appliances. The host was friendly and willing to help. The location is great as it is situated very near Charles Bridge and easy to access the center of old town.
However, please note that you need to check in at the Ruterra's office which is a bit far from the apartment, near the main train station though. In case you have bulky luggage, you may need to take a taxi from such office to the apartment and there is no elevator at the apartment building and the apartment is in the 3rd floor. The building itself looks a bit gloomy.