We stayed at this location for five weeks.
During our stay a serious mold problem was found that forced us to find another location from a day to the next. The apartment smelled mold and my daughter experienced breathing difficulties.
The extra cost of finding an alternate accommodation on such a short notice wasn't covered by the owner although they acknowledged the mold problem. Our vacation ended up 750€ more expensive due to a problem that wasn't our fault. AirBnB also didn't do more than just refunding us the remainder of the stay, which wasn't enough to cover the new accommodation.
Regarding the place itself and forgetting about the mold, the apartment is very well equipped and bright. The location is great due to the proximity to the beach and the train.

One of the downsides of the listing is that it is back to back with a restaurant, a bar and a cultural venue. One of the bedroom windows is facing the restaurant's kitchen and the other bedroom's the bar. We experienced two concerts during our stay, one of them shook the whole apartment until well past 1AM. Basically, noise is guaranteed almost every day until midnight or 1AM, at least during the warmer days when you need to keep the windows open.
The mattresses were pretty hard. This might be an important detail for some. My wife slept on the sofa for more than a week until we finally decided to buy an over-mattress to solve the problem. Initially there were cheap beds in both bedrooms but the owner replaced them during our stay.
Conclusion:
+ location: beach, park, train, 30min from Lisbon and 10min from Cascais. Plenty of restaurants around, supermarkets, etc.
+ nice apartment and very well equipped
- mold: hopefully they will repair it. Cleaning won't do.
- noisy
- hard mattresses