Wow! just Wow. I have stayed here for three weeks, and it was the most bang for your buck. The metro is a quick 5 min walk, and if that's inconvenient for you, there are so many cute shops and grocery stores on the same block.
Yiannis even pick me up from the airport with some Greek delights. Great for any solo adventurers. 10/10 will stay here again when I'm in Athens.
James