We are a family of five and reached Athens from Pelion only for two nights in order to catch our flight early the next morning. It has been very difficult for us to predict when we will arrive in Athens (many stops with the kids :) ) and unfortunately arrived later than expected. Nick couldn't wait for us but made sure to leave us a key at the next door cafe so we can get with no worries at all.
Nick was also worried that the bars downstairs will make a lot of noise and put extra beds in the rare rooms to make sure we are comfortable. In the end it wasn't as noisy and we had slept fine.
The location was a great plus! the flat is centrally located in Plaka and we went everywhere by foot. We went to the acropolis by foot (kids aged 5 &7) came back and walked through the market - it was gorgeous and Nick also gave us a recommendation of a great restaurant. The flat is also 10 min. walk (with kids and suitcase early in the morning) from the Metro station to the airport. The only minus of the flat was the tiny bathroom with very low ceiling which was packed with all the soaps previous guests have left.
All in all we had a good time at Nick's place.