I had a very nice time in Vienna staying in this apartment. The room was very spacious, and the location is quite good considering the price. The metro and tram are ~3 min away, but I would often just walk. The Rathaus and Museum Districts are about 20 mins away, with the Albertina and Opera 10 mins further away. Schloss Schönbrunn is quite easy to reach, and if you want to do a Salzburg day trip you can quickly take a train from Westbahnof two stations away.
The only thing to bring up really are that there are two dogs in the apartment. If you're super deathly afraid of them then I wouldn't recommend this place, but otherwise don't worry =)
P.S.: If you've never had Bosnian food before, I'd recommend trying out the burek at ŽELJO which isn't too far away.