The location is a little bit difficult to find (as there are a lot of similar houses along the street)mand around 10-12 minutes walk from the nearest stations. It's located in the suburb of shinjuku, 2-3 train stops away. Very local.
For us, a family of 6 travelling with small children the airbnb itself is enough for us even though it lacks a few amenities like rice cooker & washing machine and the stairs are NARROW and STEEP. Always watch your kids! But the place itself is clean, nice & comfortable bed as well.
The host is communicative about the check in and check out process.