I stayed at Ekin's room for 4 days. Ekin and his wife are really very helpful and humble people. He had serious help to reach to house and during my trip. And house is very close to underground station (1 min. by walk) and also Messe Wien congress centre (2 min by walk). Inner Stadt (also other historical buildings) is take from home approximately 10 minutes by subway. Therefore, house is very quite region and so clean. Room is large enough for two people.
If I visit Vienna again, this house will be my first choice.
This room and its owners (Ekin and Yasemin) are excellent.