Communication with Ondrej is very good, he is welcoming and friendly in his messages. He provides very detailed instructions on how to access the apartment and a list of recommendations for food and drink in the area. Everything is made very easy for you. If you have any questions, he answers you very quickly.
The apartment is in a very central location, not far from the main train station and a short walk away from all the attractions in town (trams also nearby). The apartment is fairly well appointed but lacks a comfortable seating area to relax after a long day of walking around Prague, mind you, if you walk as much as we did, you would be going straight to bed, so maybe this is not so important. Also no TV but you shouldn't be in watching telly when you are visiting such a beautiful city, get out and enjoy it ; )
The view from the bedroom is stunning, probably one of the best views of Prague (short of the area by the castle where you get a panoramic view over the city). If you are easily disturbed by light, I would recommend taking an eye mask because the curtains don't quite go around the window and, because the apartment is in the city centre, take ear plugs if you are easily disturbed by noise (traffic noise is low but you can get a lot of siren noise at weekends-same as any big city). We did have the windows open because it was so warm so this may not be such an issue if you close the windows.
The bed is very comfortable and all linens and towels are clean, in fact the whole apartment is very clean and warm. The water can take a little while to warm in the taps, so be patient. You will need to either sit or stand in the bath and hold the shower over you and be careful where you aim the spray as there is no curtain.
If you really don't like small spaces, you may struggle with the lift as it is very small. The apartment is at the very top of the building, so if you don't like small spaces and don't like climbing stairs, this is not the place for you. But, if you can deal with either of those, this apartment is well worth the money, the location alone will serve you well.
Any "downsides" I have pointed out are not designed to put you off, just observations I have made that I feel fellow travellers may wish to know about so they can make a more informed decision before booking ( I have given the same observations in my private feedback). I throughly enjoyed our stay and would definitely go back again if I were to visit Prague.