I would highly recommend Klara's apartments, especially to families with children. I was travelling with 2 teenage girls and the apartment was ideal (clean, large, 2 bedroom, kitchen and laundry, short walk to all major tourist locations in Prague). Klara's apartments are part of a larger organization called PragueCityApartments which is essentially a virtual hotel. The scale of this organization means that they have a staffed office to answer questions or store luggage, and extremely quick response times for maintenance or housekeeping requests. Klara was extremely attentive and responsive via text and email to requests and needs, and clearly understands the needs of tourists. Finally, everyone in the organization is extremely pleasant and helpful, from Klara herself, to the office staff, to the driver, George, that Klara arranged to transport my family to and from the airport.