Decent place to stay in terms of location and price. Room was somewhat dirty - lots of mold (strong mold smell from air conditioner as well). Bathroom was smaller than the pictures made it seem - the smallest I’ve used in Japan. You shower right where the toilet is.
The room was very small, even by Japan standards, it was hard to move around and access our luggage (two people). But, I don’t think it’d be a problem for solo travelers.
The location is very good. It is a short walk from a major Tokyo train station (Okubo). Also, the price was very reasonable. Hard to find a cheaper place to stay in Tokyo.