Really great for the price, me and my friends booked this apartment mostly to sleep at, as we wanted to send most of our time in Tokyo actually doing stuff and exploring.
I thought that the beds were quite comfortable for how small the place is, and the kitchen and bathroom were also pretty small, but got the job done well.
Overall great place to stay in Tokyo on a budget, just keep in mind it's not the closest to the main attractions. ( Also a benefit, cause it's very peaceful and serene at night )