Willian's apartment was the perfect place to stay during my week in Athens. It was clean, beautifully furnished, and came with two very cuddly cats who I miss dearly now that I'm back in the United States! The location is roughly ten minutes walking distance to Plaka and the Acropolis, and it's pretty much a straight shot, so navigating wasn't a problem. Being right outside of the tourism district had its advantages, too; William and his roommate recommended restaurants right around the block that were local, unpopulated by tourists, and delicious. There's a small grocery store a block or two down the street, and the metro is fairly close by (I couldn't give you an accurate walking distance time because my friend and I somehow got ourselves lost), so the location is convenient for pretty much anything you need.
As for amenities, Willian's apartment was almost better than a hotel. The bathroom came stocked with all kinds of things: shampoo, conditioner, body wash, lotion, a hair dryer...I didn't use any of it because I'd brought my own stuff, but it was nice to see the bathroom so well-stocked. The bedroom itself was nice, as well. There's a decent amount of closet space, a television, and balcony access (with great views of the Acropolis). My only complaint was that I found the bed kind of uncomfortable, but I'm also kind of picky about where I sleep, so take that with a grain of salt. I feel like I shouldn't complain, though, because everything else was so wonderful. I would definitely recommend this place to anyone travelling to Athens!