In summary, a clean, quiet and spacious area for two adults and I would stay again in this Airbnb in my next trip to Japan.
This Airbnb is 5-7 min walk away from ooimachi station. The station is very convenient as it has the rinkai line that you can use to quickly get to multiple destination (Shinjuku, Shibuya, odaiba and more) in about 30 min. There's also Keihin line that gets you to akihabara, Tokyo and more in less than 30 min.
Ooimachi itself has many restaurants, grocery stores and shopping mall around that is very easy to get to ( we went to ito yokado, Muji, Uniqlo and daiso often). It's worth spending a half a day exploring this area.
The Airbnb itself has a nice spacious bathroom, dedicated place to take a bath and shower. The Airbnb is also very quiet and we barely heard the neighbor other than some chair movement. However it is also due to the fact that everyone is respecting the noise rule and try to keep noise to the minimum.
The Airbnb has quality amenities, (providing amenities is one thing but providing good amenities is another thing). The wifi was quick, two source of heating and cooling, large washer/dryer, and small area for kitchen to heat up ramen or other prepared food (too small for cooking a meal). This unit did not have the green chair that I was looking forward to using so we ended up using the wooden dining chair majority of the time since the two cushion seating had no back rest.
The Airbnb also has easy to use entry method that require a code in the building entrance and also a code for your Airbnb door ( no worries about losing key). They also have an elevator so that you don't need to drag your luggage up the stairs.
Their is a garbage and recycling disposal on each floor so you don't need to keep your garbage inside the Airbnb ( great for long term stay).
Thank you Three!