The apartment is excellently located in a serene environment, 2 minutes walk to the famous dancing house and a few minutes walk to Charles bridge. The new eyes of Prague along the river is just opposite the dancing house and you can walk up to Vysehrad which is quite the experience.
Apart from the confusing check-in process which left my family in the cold for up to an hour (keys to be picked up at their office that is not the same location as the apartment and for some reason, that was not clear to me. Taxi's then are a different issue! First time I would have such an experience), the apartment is really nice, secure, looks and feels exquisite.