Access on foot to central Vienna couldn't be easier (20 minutes walk). The subway/metro station at Landstrasse is a 7 minute walk as was transport links to/from the airport (7 minutes walk from the City Airport Train station, also located at Landstrasse). There is a supermarket next door to the apartment building which is great for self-catering. The Wien Mitte shopping mall is 7 minutes walk away too (located at Landstrasse). In short, you will not get a better location for this price.
As for the apartment, it was immaculately clean and the sofa bed was surprisingly comfortable (if you're a fan of a hard mattress). I woke refreshed each morning and ready for sightseeing. The washing machine and dryer are simple to use and the hosts will provide washing powder (although I brought my own tablets with me). The kitchen is very well appointed and has everything you need for self-catering. The air conditioning is freezing and newly installed a couple of years ago. The apartment block itself is cool owing to its thick walls even when its 32+ degrees outside. This made for a very comfortable stay in the height of summer. The shower is very big and has a rainforest head as well as a separate shower nozel on a flexi hose. The separate toilet is handy for obvious reasons. There was plenty of hanging space for clothes but no drawers.
The hosts Michael and Liliana are wonderful and helpful. They live in a next door apartment which is handy.
I would highly recommend this place.