Nikki place is a great stay if you are looking for a cheap but nice stay for 5/6 people. It’s very convenient to get to her place from narita airport, the place is just 2 JR stations away from Nippori station. There’s also a supermarket close to the place and a 7-11 right next to the place.
it’s slightly far from the city centre (metro takes 10 walk -> ~35-40 minutes ride, JR takes ~40 minutes), but it’s a reasonable distance for it’s given price. One slight downfall is that the sound isolation is bad in the place, so you have to be really quiet / turn down the music at night; but all things considered it’s a nice place to stay, me and my friends had a positive experience.