I stayed in Helen's place with my sister & mother over the weekend and it was beautiful and perfectly located. A lot of interesting places were in a walking distance like the Monastiraki area and the Acropolis. Also it's really close to the metro. The apartment was actually bigger than we expected which was a pleasant surprise. Helen was a kind and a helpful host who made sure we have everything we needed. I definitely recommend Helen's place! No complaints at all. :)