We stayed for 6 nights at Carolina’s place with our two small children. We have stayed in Carcavelos before and so we thought the location was good - close to the beach, the station, right on the square with plenty of local amenities. It is not quiet, but that didn’t bother us. There are very loud building works which again didn’t bother us because we weren’t in a lot but would be intrusive if you planned to be.
The flat is very small but has a good private garden. It would be perfect for a couple but any more is a squeeze. The kitchen is also quite basically stocked so tricky to cook some things. We had a good stay!