Stayed at Dan's place for two nights with one other. The space itself is a little small but it definitely works for two people. Before getting to Vienna, they sent a message with a lot of information that we may need and it was very helpful. Check in was easy, the location is pretty good, the place is safe. You don't hear street noise from the room but the birds are quiet loud in the morning - nothing you can really do about it just maybe bring earplugs! Overall a good place to stay for two while in Vienna.