We (2 adults, one 9-month-old infant) stayed there for about 12 days. The place was new and very clean. Things were well-designed and placed. The dryer was a big plus in Japan.
Tatami room was spacious and perfect for a crawling baby.
The location is quite good too.
The internet could have some improvement as it didn't work beyond the living room and more than one device.
The house manual was useful but could benefit from some update with how to use MUJI's microwave/toaster oven.