I can highly recommend staying at Minamis place. It is super spacious (very rare to find in Tokyo), also very clean and just a 5 min walk to where you would want to go in Shinjuku. I loved the option of cooking ones own meals, the kitchen is well equipped! Communication was quick and easy. As everywhere in Tokyo, the walls are a little thinner compared to western standards so you might hear some noise from the street and get a little cold at night, but it was all fine and the blankets were warm :-) would definitely stay there again and can highly recommend this place to anyone who would love to explore Shinjuku and likes a cozy, well equipped base - long or short term! Thanks Minami!