We were in Cascais to attend a Jamie Cullum concert and the apartment was just what we were looking for - and as described.
It lacked nothing we needed on our four night visit mixing restaurant, café, bars and some simple meals in the apartment.
We loved Cascais and really liked the central location. We were not ourselves troubled by the two flights of stairs - not as narrow as some in Lisbon region!
There was certainly town centre noise over the weekend but we slept well when we wanted to but some might not.