The flat was very nice and looked exactly like the pictures. It was clean, spacious, and comfortable. The balcony also gives you a nice view (though the shared balcony's view is a bit nicer...I'd recommend sitting out there at night for a view of the castle).
The check-in process was very smooth. Anita is kind, helpful and was quickly responsive to any of our questions or needs.
The location is as described. The door to the building opens to a very touristic street (the street of the Charles Bridge). It was quiet at night; we slept very well, but sometimes it was overwhelming to step out of the building into such large crowds.
Overall, we recommend this apartment.