I stayed with Portugal Portfolio for nearly one week and enjoyed my stay very much!
The staff are professional, kind, and responsive. They even scheduled a friendly private driver in a nice car to get to the airport at a fair rate.
The location could not be any better. Cascais is small and this is where you want to be. There are countless restaurants nearby. The train station, market, and beaches are all moments away by foot. It's quiet during sleeping hours.
The property was very clean and well appointed with a decently comfortable bed. The listing suggests there is no air conditioning, but there is, and it worked just fine during those times it became too hot in the room. And it sure was nice to have a clean clothes washing machine.