We chose O&B hotel for its location and nice rooms and it was as expected.We rented the Thisio Double (3rd floor) to be far from the street noise. Wifi was good, breakfast was awesome every morning. We didnt get to visit the rooftop bar as we were out every day.
The lobby is within the restaurant, very small. Friendly staff. There was a welcome snack in the room (see pictures). The room was nice and modern, very bright with nice showers but thin walls. As the hotel wasn't full end of September, we weren't bothered by noise too much.
The hotel location is on a side street by the bazaar area which is filled of bars and restaurants. Don't expect easy parking around the hotel. We took a cab from the airport which was not expensive.
Athens main sights are within walks or easy public transport.More