Good value and decent location. The property is not walking distance to Shinjuku (about 35 minutes away). It is close to Takadanobaba station though, and Takadanobaba is itself a bustling area with plenty of restaurants. Try Daichi no Udon just around the corner — an amazing udonya.
The space is small, but manageable with three people if you’re comfortable sleeping two to a bed and stepping over one another during the night.
We had trouble with the wifi: basically, the login details on the listing were wrong. Make sure you confirm the details with the host before you arrive.