The flat is amazing and Sokol is an incredible host.
Unfortunately the neighbourhood it is located is not as lovely as other in Greece but as there will be a lot of walking in your visit to Athens, you won't be around that much and coming back to this lovely apartment is great.
Sokol will be your best guide to local restaurants and he will always answering the phone in a couple of minutes if needed.
The flat has everything from a comfortable bed to a rooftop with a lovely view from the Athens.