Great location. About a 7 min walk from Shin Okubo station. About a 15 min walk to Shinjuku station. Many nearby restaurants.
It could definitely improve on cleanliness, especially in the shared area. The bathroom smelled like cigarette smoke when the exhaust wasn’t turned on. The washer/dryer were a bit old, so my clothes were still damp after an hour in the dryer. The air conditioner was noisy for the first two nights of my stay, which kept waking me up. The toilet also had issues with flushing (water wouldn’t stop flowing to the bowl), so I had to remove the lid and fix the mechanism. There were no curtains/blinds, and the window faced east, so it was difficult to sleep in. Overall, still good value for money considering the location.