Very clean.
Very close to the tram(50m), metro(70m) and train station(70m).
Trams are working 24h/day in Prague.
With tram 91(night tram) within 15minutes you are back to flat.
('Tram 91' passes middle of the city centre. So wherever you are 01:00, 02:00, 04:00 in the night; you are only '10 minutes walk away' from the "tram 91 route" to the flat .)