I stayed at Pablo's apartment with two of my friends and their 2 year old for 3 days in Vienna in June and we had a fabulous experience. The apartment is very well located and is just a short tram ride away from the historic district. There are also 2 U Bahn lines a short walk away. The canal is very close by and is great to walk or jog along.
The apartment is very airy and bright and is very well maintained and we did not have any complaints at all on that score. The building also has an elevator, which we didnt know about before and that was a pleasant surprise.
The art on the walls is work done by Pablo and you can have a very rewarding discussion on art and Italian politics with him!
Pablo is very hospitable and gave us great tips on where to go and things to see. He also lent us a pram so my friends kid didnt have to walk all the time. There was a small mix up with our check out time but Pablo didnt let it mar our experience and took us to his house and when we left he packed some fruit and water for our train journey as well!
I would have no hesitation in staying in this apartment again.