We had an enjoyable stay. My elderly parents have limited mobility, and the few steps up to enter the building were fine for them. Then it was a matter of a lift and no more steps. We relied on a car and taxi to get them down to Cascais, but it was a nice walk for ourselves.
There are great views from the apartment, and to explain some of the other people’s comments - some windows don’t get blurred by the rain and fog, but others do.