Nick's place is a superb option in the center of Athens.
Pros: Close proximity to the sights/shopping areas/museums/theaters/supermarkets/etc.
The quality vs. price is excellent. It's recently renovated and VERY clean and quiet.
Communication with Nick is a pleasure, and responses come almost immediately. Check-in and check-out are easy. The subway stop is 5 min away.
It was a pleasure to stay at Nick's apartment, and we plan on using it in the future.
Cons: none.