Apartment left in the care of agency and the team (Moira) responsible for our stay was awesome. Communications were handled in professional manner, replies were prompt. They even offered to help book airport transfers, which made the trip a lot less stressful than it could have been.
Apartment is a 40 mins ~ 1 hour drive from airport depending on route taken and traffic conditions.
Apartment located near tourist spots, the Acropolis being a 10 mins walk away. There's a public market (every Friday) 3 mins walk away. Several supermarkets nearby (~5 mins), but they're closed on Sundays. Monastiraki is about 25 mins walk, expect upslope journeys.
Neighbourhood seems relatively safe and quiet.
Great amenities within apartment, water heating is reliable with the exception of kitchen sink (takes longer to deliver hot water). Toilet equipped with supplies. Towels provided for. Wifi speed is fast. Glass doors insulated well. Soundproofing better than average - only hear occasional shuffling of feet or people in the corridors. Nice décor and has a distinct style of its own - simple but modern. Two pillows each. Very clean everywhere.
(Slippers not provided, prep your own if you want.)
Overall, great value for money. Especially if you were to compare it to the hotels, amenities alone this apartment wins hands down. Plus there's a homely feel to it. :-)