I had an overnight stay in Athens, and my host suggest a few hotels, and I chose the Airotel Stratos Vassilikos Hotel. Great choice ! The receptionists all spoke excellent English, the rooms was clean and wel appointed, bed was comfortable and the shower was as almost as good a my powershower at home for 4/5 for the shower. Free breakfast (very Greek in content) which as really tasty.
Well cocomnded and a really good deal at hotels.com