My girlfriend and I were both delighted with staying at Bellal's place for three nights during our trip to Vienna. Despite its small size the apartment is very spacious and cozy, especially the loft bed which we really liked. The place has all the amenities you'll need, and a well-stocked kitchen. The apartment is very quiet, but the neighborhood it is situated in is still lively, with a lot of cool places to eat and hang out.
The metro is not very far form the apartment, and the tram is practically just outside the door, so public transport is easy to access - just 10-15 minutes by tram or metro, or 25-30 minutes by foot, and you're in the city center.
Bellal was a excellent and professional host - he answered all our messages quickly, and was very helpful during our stay.
All in all, if you're looking for a clean, cozy place to stay in Vienna, which is good value for money and close to the city center, then we can't recommend Bellal's place enough!