Agis' apartment was amazing. It was every bit a 5-star luxury experience. Everything within the penthouse was state of the art and top of the line but even better, the view of the Acropolis was spectacular. We had a pretty short stay with only two nights and one day but in the afternoon we were tired from walking around all morning in the heat and I didn't even feel bad about missing anything coning home for a rest because I could lay on the couch and have one of the best views in Athens right in front of me.
Agis was also a very gracious host, mapping out sightseeing, giving us restaurant recommendations and even calling for reservations for us! It was like having concierge service. He also genuinely seemed to care about making sure we had a good time and even arranged car transfers for us and called the driver while we were headed to the airport to make sure everything worked out ok.
Lastly, the neighborhood was vibrant and lively with many cafés, restaurants, shopping, a metro station and it was in walking distance to the historic sights.
I couldn't recommend PLUS more. You will love it here.