Stayed at Maison 66 for two nights when we arrived in Athens and had a very good first impression; the room was very clean and modern and the hotel looked great. Very good value for money we thought. And then we realized that the windows could not be closed properly since they're sliding doors and one pushes the other everytime, which makes it impossible to have proper protection against noise. That results into extremly noisy nights since the hotel is located beside the highway and you can hear all the cars and motocycles going full speed all night long. I cannot understand why this problem wasn't adressed when the hotel was built. We talked to the person at the reception the second night because we couldn't sleep at 2AM and he wasn't helpful at all, didn't believe us when we told him, and when we showed him how noisy it was he lied to us and said that they would "close the highway after 2AM" and added "that's how it is, what do you want us to do". No discount, no other room, no solution was suggested, just shoulders being shruged. Very, very disappointing. We barely slept (we had to take the boat at 6 the next day) and left very upset.