We just visited Pantelis' apartment and, besides it being romantic, it was also very clean, spacious, well located and gorgeous.
It is definitely a place where you can feel just like home. The building itself is also very proper and you can either take the stairs or a small elevator to the 3rd floor. The place is quiet and we couldn't hear anything disturbing during the three nights we spent there.
The area is quite decent and not "touristy" so you get the vibe of a real local living. It is much closer than we expected to the Acropolis Museum, literally, just a walk away, and a few more steps away from the Acropolis itself (it took us less time than what Google maps says). There you'll find a nice strip with restaurants, shops, etc. Also, near the apartment you'll find many tours and travel agencies (e.g. we used Key Tours for a trip to Delphi and we just walked there). A few other monuments/ruins are very close such as the Gate of Hadrian, the Temple of the Olympian Zeus and the Panathenaic Stadium. Seriously, we walked the whole Athens from here!
People wise, these guys cannot be any nicer! Pantelis arranged our taxi from the Airport and we were received by George who didn't hesitate to give us tips about Athens, what to do, how to get to places, etc. We had such a fun chat that the ride was a blink of the eye. In the apartment we were welcomed by Theo who was super sweet and kindly showed us the place, gave us good tips and talked a little about things we should try and do. Finally, we had the opportunity to meet Pantelis himself our last night in Athens as he came down for a quick visit before we went to sleep. He has a very pleasant personality and even brought us a little present! We couldn't be any more grateful and pleased to have met him.
This was our experience and we hope that who ever reads this will also take the opportunity to come see it for themselves. We would definitely come back to Pantelis apartment!
As I said to him, if I ever move to Athens, I'll buy it from him and live there... We'll be good neighbors.