I didn't get to know Sofiana in person, but I dealt with her mother when I arrived and a few more times later and she was always lovely and helpful. The stay was nice and warm, although one of the sofas is not the most comfortable to sleep on (too hard) and the bathroom door was broken (there was a stone that needed to be put against it each time to keep it closed), but it was just a little annoyance, nothing important. And the big bed was really comfy!
There is a market right next to the appartment, which is very convinient, and the Akropoli metro station is 15' walk far.
The only complaint may be that they accepted a reservation from other people starting while we were still there, without consulting with us, so they moved us to another appartment for the last four nights. But it wasn't a big trouble because they carried our bags by car at the time that suited us better, and the new place was excellent and nearer the metro.
So despite the little inconveniences, it was definitely a nice experience :)