We have spent a short night at Yohanis place. The apartment itself was absolutely fine, Yohanis was a great host, fast responder and really took care of us.
The only thing I have to mention is that the location, as presented, was a little confusing. Actually, we had to take the metro to reach Yohanis place, and it takes much more than 5 minutes to get there. As the distance from the center of Athens was is too far, we had to reorganize our day in order to avoid going back and forth between the center and the apartment. It was disappointing but we figured it out and discover another part of the city!