Stay at Elena and Kira's place is the right choice. I stayed for 2 nights. Everything is so clean and neat. Kira is so helpful and informative. The young lady in the reception is so nice and kind. You can ask her and she will always help you. The place is near to the famous Wenceslas Square, is about 10 minutes walk from the apartment. If you wanna go to Prague castle or Charles bridge, you can go by tram. The tram stop is about 3 minutes by walk from the apartment. I strongly recommend this place when you visit Prague.