Christian was a very nice host, he knows very good the area around the flat, good restaurants etc so you won't be hungry :) He also may give you good advices about the whole city as well. Communication was good at all steps of a visit, flat was clean and nice. It is also possible to use a guest laptop for an Internet, so it is not necessary to take your own. If you come by bus from the nearest cities the flat would be a very good choice, because is is very close to Stadium, the bus station. I would like to recommend Chrisian's flat for visiting Wien.