2 years ago we stayed in the same area and we really loved it (500m from the flat), so we decided to rent this flat mainly for the location. We were quite disappointed.
The flat is quite old (described at retro) and all the amenities also. Walls and ceiling are quite dirty (stains) and need a serious refreshing. You can feel that the flat is run-down.
The double bed in the room is really tiny so if you're tall I will not recommend it. Also the other floor mattresses are really bad quality and cheap stuff, too soft and thin. My sister needs to use 3 mattresses to sleep and even with this, she woke up with back pain.
Also, the bathroom was full of small flies, I guess that it's related to the permanent humidity, but it wasn't very convenient.
Also the lock of the entrance door is not working every time, we always reached to open the door but sometimes we struggled a little bit.
Finally, we also tried to reach the host the day before leaving the flat as we wanted to ask her if we can leave our luggage but she never answered, so we had to walk and find a place to leave the luggage (normally there are many lockers in Shibuya station where you can easily leave them but everything was closed because of Trump visit).
Finally I would say the flat is overpriced for the quality, we paid less for a much better apartment in the same area 2 years ago. (I understand that prices have increased in 2 years but this it's definitely not a good value).