Unique is the word. This goes for the place, as well as for Panagiota (Yota) herself.
Visiting Yota is like stepping into another world. Her small house, filled with her designs and creations, is very centrally located a short walk from Monastiraki subway station, next to the Agora and just below the Acropolis. This is a blessing as well as a curse. Sitting on her amazing rooftop terrace looking at the Acropolis is priceless. But the neighborhood is not the most quiet place in Athens, squeezed between a small church with ringing bells on one side, and the busy Monastiraki Flea Market on the other.
You share the bathroom, which is not like a brand new, slick hotel kind of thing, with the other guests.
As long as you are prepared for this, I think you will enjoy your stay at Yota's place. You could just go for the value she offers - the location and the very reasonable price. Or, and this is for me what makes travelling exciting: go for the adventure.
Meeting Yota could be one of those experiences for you too.