We stayed in Vanda's apartment in Monte Estoril at the end of September. We absolutely loved it, it's a fantastic apartment in a great area! The apartment is in a large building in Monte Estoril, about 5 minutes walk to the local train station (Lisbon to Cascais line) and 15 minute walk along the boardwalk to Cascais. There's a private garage underneath the building for parking. Some handy shops in the area, including a lovely bakery opposite the building, and a few cafes and restaurants. A short walk to either Estoril or Cascais for lots more amenities.
The apartment was great - very spacious, large bedrooms, stylishly decorated (loved the huge canvas prints in some of the rooms!). Kitchen was well stocked with cutlery, everything you'd need. It's a duplex apartment with 3 bedrooms and 2 bathrooms upstairs, plenty of room! Cable TV (several English channels) and fast WiFi as well.
One of our favourite bits was the balcony - south facing, gets the sun all day, and has retractable sun shade. Nice view along the coast to Cascais.
The building manager Sr. Domingos was our contact for the keys etc. - he was a really nice and extremely helpful guy, and speaks perfect English (very handy if your Portuguese is limited!).
Although we didn't meet her, Vanda was also great at replying to emails and getting in touch to make sure everything was going OK.
I can highly recommend this apartment, we would certainly keep it in mind for a return visit!