We loved our stay at Manuel's apartment. It's huge, has a great family friendly pool and a nice balcony that overlooks the pool. Walking distance to the centre of Cascais and in a really nice quiet neighbourhood.
We had an 11 month old with us and she got dirty fairly quickly when crawling around so I think it could have done with being a bit cleaner for little ones but it wasn't a major problem.
There are 2 parking spots which were really handy for our hire cars. A supermarket and petrol station over the road are also a bonus.
Overall a very pleasant stay.