Fantastic, couldn't have asked for better. Has windows from both the main living area and the bathroom. Doesn't face the main street (instead faces the inner courtyard), so not noisy and easy to get a good night's sleep. Prague City Apartments' office is open and available by short walk or direct line 24 hours, and they were very helpful (they even set up a free airport transfer on our arrival).
Much better than a hotel.
Washing machine!!! and daily housekeeping.