The place is great. It looks like it was recently renovated. It was clean and had all the amenities you needed. The apartment is located next to bus stations and also a metro/train station. You can get to Hofburg palace and the center in 30-35minutes walking.
The only problem we had was with Aleksandar being really slow with responding to our messages. You have to insist with multiple messages in order to get answers. If you are ok with the communication issues, I definitely recommend this place as it is a great offer for the price.