Great location to public transportation, it is quite small for 4 people. I would suggest 2 people.
No air conditioning is a little tough during summer months.
The street traffic is pretty noisy during the day but is better at night.
There is a bakery a few steps away that is great for coffee and pastries in the morning.
A short 5 minute walk to the tram or grocery store is wonderful.
We Loved Vienna and look forward to returning.