Aris's place is very cozy, clean and has a lot of amenities. There were fresh oranges, apples, tea, coffee, jam, bread, milk, a few bottles of water and juice in the kitchen. Each room has an air conditioner which is really necessary when it's +35 outside. There were five of us and there was more than enough space.
The neighborhood is pretty plain and not the most attractive but simply a standard Athens residential area. The distance from the place to all important sights is a 20-30 mins to walk, but if it's too much for you, you can take a taxi which is 4-5 euros (a ridiculously low price) or the subway (the nearest station is 3 mins away). The subway is very clean and easy to use in Athens.
The owners made a lot of effort to make sure the guests have all the amenities and information. The provided board games, some books, tourist info brochures and a detailed guide to the apartment and surrounding restaurants/businesses.