We enjoyed our stay at Konstantinos place and I would recommend it to anyone traveling to Athens with friends. Konstantinos has a system at his airbnb that allows you to enter any time which is highly appreciated because it's not always possible to travel and arrive within usual check in times. And Konstantinos is a great host always answering you messages fast and providing all needed instructions. His place has all you may need, it's clean, stylish and equipped with very modern appliances.
The place's location is great as well. I actually walked from here to all the main Athens attractions I wanted to check. Of course you can take transport from here but I wanted to experience more of Athens. Also here are shops and restaurants, so all you need while travel. I would also add that despite it's close to a big street the neighborhood is quiet and cosy.