Hans flat is in the perfect location to explore Vienna. Either on foot or with public transit. it's quiet roomy and definitely houses 5 ppl without any problems.
if I had a gun to my head and were forced to mention sth negative it would be that it sometimes was a little bit noisy from cars and such, this the door in the kitchen area is not isolated. oh, and the kitchen is missing a pot. so, if you want to cook for yourself, bring a pot. han has a very nice pan though