I stayed for the Vienna City Marathon at Silja's place. Silja is a super friendly host and helpful. Large room for one person with a comfy bed, room and bathroom were super clean and all needed stuff was available. Location is amazing, really central and close to all famous sightseeings and also directly located in the hip area of Vienna surrounded with many nice cafés, bars, restaurants and shopping possibilities. I totally recommend this place and would book it again.