I stayed at Sayaka's unit in Shinjuku for around a week together with two friends. Without a doubt, the greatest perk of this listing is the location. Being in such close proximity to the Shinjuku Gyoen-mae metro station made getting around Tokyo very easy & convenient. There are also plenty of restaurants g night life options close by to the unit.
My biggest complaint about the unit would have to be that the bed was not super comfortable, especially when shared by two people. Both of us found it a little too firm for our liking, though not to the point where we couldn't fall asleep.
The other small thing that could have been better was that the portable WiFi unit was rather finnicky, and not very reliable as soon as you go indoors (even in the unit itself we sometimes had trouble connecting).
Besides that, though, all the rest of the unit was great as could be hoped for. Having access to a washer was super useful, and the bathroom came fully furnished with soap/shampoo/toothpaste. And towels! Many many clean towels, there must have been around 15 haha. Overall, a very pleasant home base for our week in Tokyo. Thank you Sayaka!