The apartment is quite small (good for one, suitable for two) , located in a great place (5-10 min to go to Stephansdom), and offered for a good price.
With an old furniture and being not so comfortable as a hotel, it however has almost everything you may need: internet, fridge, washing machine, stove. Only thing I was lacking was a microwave oven.
Window looks into a inner courtyard, so there is almost no noise from quite a busy street along the channel. However the entrance door is thin and you can hear neighbors sometimes.
Another peculiarity is a gas heater for a hot water, it is not very easy to deal with.
To summarize, I was glad to live a month in this place.