My experience in Thomas apartment was excellent, everything was really fine.
I was in Vienna to attend a 2 weeks residency for a master program in WU academy, which is just 5 minutes walking. Supermarket in practically located in front of the building and the U-Bahn station is 200 meters away.
The apartment is quite and furnished with all the appliance I was needing.
Thomas is very helpful, he gave me a lot of tips and he also provided a map suggesting a nice city tour.
I strongly recommend Thomas apartment for a staying in Vienna.