If you just one or two people and staying over during weekdays I guess the value is okay. If you staying over the weekend, book a hotel. The price for the weekend you can get a much better and comfortable place in city centre of shinjuku.
I booked for two nights over the weekend for three adults and the home wasn't comfortable, we decided to book a hotel and moved out.
Split system heater/cooler requires maintenance - the heater blowing out warm + cold air no matter if you turn the temperature upwards, its still the same temperature of air coming out. Kind of frustrating during winter...
There was a portable heater in the kitchen - used that instead.
Tv - it shows there's no signal or something? Not much instruction given regarding operation. Not major issue.
Kettle - not working, tried to plug in to different ports, didn't work. Host was quick to respond to give us another one the next day.
Bathroom as indicated on the advert, its really small.
And you have to turn on the water heating regulator for the hot water when you move in or it will be cold water running.
In the morning, going to make quick breakfast using the electric stove, microwave, with portable heater at the same time, the power goes off - had to go to fuse box to get the power back on then use less appliances.
Everything in the home is switched off so when you move in, make sure you turn everything on, hot water, swithces for the appliances plugged in and the portable wifi.
Anyhow, as its in a busy district in shinjuku, you can hear alot of the noises outside, if your not tired or a light sleeper, it would be a bit difficult.
Overall, the place was really clean, essential amenities like split system cooling/heating, kettle requires a maintenance. As well as the power surge issue might need to be looked at too.