We had a wonderful time at Nikos's place and would definitely recommend it. Nikos was extremely helpful and easy to communicate with and we had no issues at all finding the apartment. It was very clean. I personally loved the location. The neighbourhood was the perfect balance between convenient for all the things a tourist must do (with an easy and interesting 20-25 minute walk to Monastiraki square) and having the sense that you were living like a local. Supermarkets, places for coffee, breakfast and drinks were at the doorstep. Being able to come home after a hot day of sight-seeing and relaxing on the balcony with a view of Mount Lycabattus was one of the highlights of not just the apartment but the whole trip to Athens. We would not hesitate to stay again!