The quick summary:
We got the 2 full bed studio apartment that sleeps 4. It was well kept, clean, and stocked nicely with all amenities you'd need including a full, albeit small, kitchen, and even a washer/dryer. Best of all, the property management team was very quick to respond to messages.
The longer review:
Check in was a breeze, with clear instructions in several different languages, we even got early checkin free of charge.
In Japan, everything is a little smaller, this apartment was no exception. It was a little tight for our family of 4 (2 adults, 2 kids ages 10, 13), but still met, and even exceeded in some cases, our expectations. If it were 4 full size adults, I would recommend a larger unit.
It was in a quieter area, but still close enough to subway and bus stops so that it was still convenient. The subway entrance we used most often was about 3 blocks away, less 10 minute walk. There are several convenience stores within a 5-7 minute walk. There is also a slightly more busier street with more restaurants and bars about a 10-15 min walk away.
The best part of this apartment was the in unit washer/dryer. And while the space was small, everything was organized very well, maximizing the space used. The toilet was separate from the shower and sink so you wouldn't have to fight to use the toilet if someone was showering.
We were very happy with our stay.