Lovely flat, well located in terms of walkable destinations around, as well connections to public transport. The flat was as advertised and the hundreds of books in the flat, most of them in English, were a bonus for my wife and myself. We are both journalists and avid readers and the crammed bookshelves were a reminder of home as well.
Air BnB's listing was a problem - it shows the apartment number, but not the building number, which you need to find the building in the first place! I had to call the US helpline, but once I reached them, the support system worked very well.
The flat is in a 19th century building and is charmingly quaint. Be warned -- the stone spiral staircase looks beautiful, but hauling up your luggage four floors is tough!
The wi-fi worked very well and all in all, the flat was exactly what was advertised -- a sunny flat in central Prague.
The flat owner wasn't in Prague when we were there, but he responds quickly to emails and is quite helpful.