Great place in the heart of Shinjuku, close walk to Nishi-Shinjuku station and not far walk (about 10-12 minutes) from Shinjuku main station. In U.S. this apartment would be called a studio, and it's very typical in Japan. The toilet is separate from the bath/shower, which is a step above many other apartments in Tokyo where they're all together. The place is clean, the host provides good information in the apartment for how to use the appliances, how to turn on the hot water, how to separate the trash (you must recycle) etc. The hosts are super responsive. I would definitely stay here again.