This flat is in an amazing location, so close to the Charles bridge and a short walk to everything in Old Town. For the location, cleanliness, amenities, and providing, I couldn't recommend a better place to stay.
As a pro-tip, I would recommend trying to find a way to drop off a vehicle prior to check-in time, as the street is super busy that this is located on and makes it difficult to stop, drop-off luggage, and check in, in a single maneuver, requiring parallel parking and/or illegal parking to do so if you haven't dropped a vehicle off yet if arriving that way.
Great views from the flat, awesome old-building feel, and practical amounts of space, washer/dryer, kitchen space, bathroom space, etc.