It was my second visit to Tokyo but still everything was quite new. But one thing I can assure you is the very importance of transportation access to downtown. It is extremely rare to find a cozy place with affordable price as well as good access to the city. Otsuka is quite central giving you the easy and short access to everywhere: Ginza, Roppongi, Shibuya and Shinjuku and more. I think it was more efficient in terms of time spending and traveling thanks to the place. This will be one of my top place for the next visit!