The house is great in general, yet there are a few problems:
1) The place is smaller than it looks on the pictures. Especially the pool.
2) The house is directly located at a very busy street (the Main Street going to the beach). When you’re in the garden it’s not really relaxing.
3) I’d recommend to not rent the house in fall or winter as humidity is super high (~80%) which is causing mold to spread in the inside. I had to throw away my backpack as I left it next to a wall and it was completely moldy afterwards
On a positive note:
You’re not gonna have this problem in the summer.
The house is super well equipped as it’s used as a summer house and the host is super nice, helpful and accommodating.
Also you can see Sintra Castle through the kitchen window!