We really enjoyed our stay in Fuchu and can recommend it to families.
We (2 adults + 1 newborn) directly came from Haneda airport by the limousine bus to Fuchu station. From Fuchu station (because of the luggage and convenience) we took a taxi to the airbnb for 800¥. We arrived later than expected, but check-in wasnt a problem.
The host was very friendly and took our heavy luggage to the upper floor. He explained everything clearly and gave us the keys. Even though we didnt met him except check-in, we felt very welcomed and home. The upper flow is huge, so our baby had fun to explore all the rooms. We used the balcony quite often to calm down the baby in the night, which was very helpful! The kitchen is very well equipped.
The location is superb with the beautiful and large park just on the opposite of the road (there are a lot of families with small kids walking/playing in the park, espacially on the weekend). There are cheap buses (100¥) to Fuchu station, but we preferred to walk to HigashiFuchu station by crossing the park.
The street is a bit noisy and well traveled, but on the other hand you got an bus stop nearby (and well, it´s Tokyo...).
All in all a nice stay in a nice neighborhood, which seems to be polular to young families. This is a good place, if you search something a bit away from busy Shinjuku.