I was quite often stay in Shinjuku Washington, whenever I traveled to Tokyo. Because, if you want to go to airport (Narita and Haneda) by Airport Limousine Bus, the bus stop just down there right in front of the hotel. It's easier than go by the train. There are also convenience stores down the lobby. Easy check in and out. Only the room is a bit small for 2 persons, my recommendation better to choose twin bed than the double. But, it's very common in Japan, almost all hotels only have room around 11-16 m. Overall, everything went well. And definitely go back again and stay there again!