Excellent stay for a stag weekend, would definitely recommend. Sofiya was friendly and communication excellent.
Apartment is up around 5 flights of stairs and has plenty of space. Beds are large and were with separate bedding. Extras like speakers, Xbox one, flipchart and fancy dress box were a nice touch.
In terms of location it is around 20min walk to Wenceslas Square bars which is flat. An excellent Vietnamese restaurant called Tre Xanh is nearby. Also Retro Music Hall - EDM Club was good and is a closer 10min walk