We spent a week in the second half of June in the villa, and were very satisfied with everything!
Altogether we were 10 persons (2 families with children aged 7 to 16 and 2 grandparents) there was plenty of space for everyone. With six bedrooms we even had one bedroom 'extra' (originally we had planned to have one more person with us, needing a single room). Also great to have a separate large dining room and large lounge. Everything looked as on the pictures. The beach was indeed 5 minutes away walk away; along a relatively busy street but with a pavement.
We parked two cars on the driveway - this was possible if one car drove backwards down which was a bit tricky, but fortunately we had a couple of skilled drivers with us. There were a lot of beautiful flowers around the house and the lawn was perfect for badminton and football.
The beach felt very luxury in that it was large and with relatively few people on it. It's probably busier in July and August, but I imagine that it still would have much less crowded feel than for instance the beaches of Estoril and Cascais (not to mention Italian beaches!). I also appreciated that there were no vendors, and attentive but polite life guards. We also used the pool a lot, both for playing and early morning swimming tours.
The small fish market 3 minutes a way was a holiday attraction in itself! We cooked at least two fish lunches with fish from there.
Great dinner place in nearby Azonhas do Mar, and Sintra was worth several visits (don't trust GPS too much though - the guidebook said that it is a 'maze' and that was not an overstatement ...).