Everything is perfect in this flat : location, clean, communication...
The flat is calm (except when the hostel just near the flat have some party the Saturday evening or when a dog barks without pause during one hour...but for Lisbon it's hard to have less noise than that).
Wifi was ok but not very powerful, hard to stream youtube in HD as example.
The flat is better than you can see in photo, beautiful view and pretty big.
Will return.