I am a Telecommunication Engineer.
Me and my girlfriend Jelena stayed 3 nights at Boris's apartment. It was clean, well equipped, provided with good wi-fi connection and air-conditioning. The apartment is very centrally located, only few steps from bus stops, Republika Square, Knez Mihajlova pedestrian zone and the most particular bohemian quarter-Skadarlija. To anyone who wants to visit this beautiful city I definately recommend Boris's apartment!
The place is very well furnitured. The apartment is in the very center of the city and all major cites are in a walking distance. There is a cable TV and very good WiFi connection. The AC was a life saving as it was very hot :)
The host is very kind, even let us stay the last day till afternoon as nobody was coming that day. I recommmend it!