The location is good, 20min walk to two really nice beaches, we especially enjoyed the Foz do Lizandro beach, it’s great for both surf and small kids.
To center of Ericeira it’s roughly 35min by foot.
The apartment is nice and we appreciated the big garden and the sea view. We were with 2 small kids (4 years and 9 months old) and we found it somewhat challenging to stay in the appartement; it’s not really adapted for the little ones-there are only bunk beds in the two bedrooms (which is not very practical) and the bathroom is tiny with the sink actually placed in the corridor.
Having said that, the hosts are very nice and helpful (and their dog is a real cutie). Definitely recommend this place for couples or a group of friends.