My girlfriend and I spent 3 nights here - every evening we were sitting out on the huge terrace, having a few snacks and drinks, while enjoying the breathtaking view of the Acropolis.
Yannis & Tax were very helpful and responsive about any questions we had - they also organized a top-notch transfer at 11pm from the port on the night of our arrival (shout out to the great driver!) as well as to the airport.
Also all of Athens' main sights are easily reachable by foot - we never had to use any form of public transportation.
We were even able to spot the big, circular window of the apartment from up on the Acropolis, was quite fun to look for it 😄
Overall it's a great place if you're here for the view. The apartment itself is rather small, which is not an issue at all, since it has everything you need - in a very modern-looking way.