Great place for a great value. Has an air conditioner in the cieling that works very well, and an air purifier too. Firm beds and nice flat pillows meant I had a great night's sleep every time. Elevator access for those who don't want to walk up the stairs. Has a little balcony out back where you can see the city. Small kitchen, a dryer, nice shower, water boiler, microwave, rice cooker, and in general a larger space than many. The TV is tiny if you care about that, and there's no outlet in the bathroom so bring an extension cord for shaving etc, but it's a great value, I'd definitely stay here again.
Nakano is also a great place to stay, there's vegetarian food, game stores, a park, all super close to the apartment. Also close to Shinjuku (one stop on the chuo rapid) for travel to other regions. In all, I'll definitely return here next time if possible!