We had a super stay at Konstantinos place. We were only there for one day/night on our way home from sailing holiday, but Konstantinos arranged ro us to be able to drop off luggage early, so that we could have a convenient day in Athens without having to carry luggage around - Super nice.
The apartments were spotless clean and really centrally located - we walked to everywhere in town from there. The neighbourhood a bit rough, but we never felt unsafe. I would recommend this for anybody.