This is hands down the most impressive airbnb I have ever stayed at. The word that comes to mind is "palatial" — each room is as big as some entire airbnbs, and there are two big bedrooms, a living room with a gigantic comfy sectional couch and a huge TV, a full dining room with a table long enough to seat eight people, a well-appointed kitchen, two full bathrooms (one of which has a working jacuzzi!)... your biggest challenge will be mustering the desire to actually leave and go do things.
Luckily, the location is so optimal that you won't have to go far. Just looking out the window in the living room will give you a beautiful view of the river and Prague Castle beyond it. It's also a very short walk from Karlův Most. There is a Czech restaurant literally on the first floor of the building, a great Indian restaurant a block away, and so on. I highly recommend snagging this apartment if you can get it, and I fully intend to do the same next time I'm in town!