It’s a two-story apartment which can accommodate 4-5 people. There’s a pocket wifi that you can bring outside.
The apartment is about 10-15 minutes walk from the nearest JR station (Nippori). You need to pass by some stairs to be able to get to the apartment so take note of this if you’re bringing some luggages. No transfers needed if you’re gonna take the Skyliner from Narita Airport. The nearest metro subway station is the Sendagi station (about 5 minutes walk). There is a pharmacy and convenient stores nearby.
Excellent host! She is very responsive and helps us whenever we have some questions. Replies fast.