This place can be highly recommended. If you want a place to stay outside central Lisbon, but still be able to experience it, this is a prime location. The apartment is in a complex just 4 minutes away from the train station, taking you either to Lisbon or Cascais. The apartment is also just a stones throw away from the beaches. It is very clean and tidy, and has all the essentials you'll need. However, it should be noted that it is close to a Casino, so there is some noise. We were not bothered about it at all, as it was barely noticable.
Also, Inês is such a good host. We arrived very late Saturday evening, and she welcomed us - even with some treats. She is highly responsive, which made our trip effortless. Overall, a very great stay, and we'll definitely be back.