I don't know what else there is to add that hasn't already been said by many of the other reviewers.
Place was clean, as I expected. She had a handy dyson available to allowed us to clean if we wanted as we stayed for 5 days and definitely needed it.
Size: for Japan standards, it is definitely spacious. Enough space for my family of 6. Enough space for our luggage as well. We liked the big dining table and we spent a lot of time there relaxing and planning our days.
Bathroom: nice toilets of course. One of the showers is definitely small compared to anything in the US but I didn't mind it at all and actually preferred that shower over the bigger one. Only thing I wish there was another one was a mirror outside of the shower. There's only one in the bathroom over the sink and another one inside the main shower. So if there's someone in the bathroom showering, you were out of luck.
Location: a lot of restaurants and shops around the area. It is 2 stops away from Shibuya but be ready to be in a cramped subway. That subway line that goes towards shibuya is always packed and we had to shove ourselves in the subway. On the way back as well. It was really only an issue because there were 6 of us and we always had to make sure everyone made it.
Suyeon was super responsive to all my questions and was always helpful. Loved the snacks she left us. Loved the washer/dryer and she left english instructions which made it easy to use. I would definitely stay at her place again.