Gorgeous flat, just outside the busy part of the city, easy walking distance from the metro station. Fantastic views over Lisbon, which our hosts used to point out numerous things to see while we were in the city, along with several suggestions of things to do or see that we wouldn't have known about otherwise - and would have been sorry to have missed.
The photographs are totally accurate, but don't quite convey the friendly atmosphere of the flat and the splendour of the location.
There's a couple of very good places to eat/drink and a large supermarket 5 minutes walk from the front door.
When we go back to Lisbon, because 3 days weren't enough, we'll be checking the availability of Top of the Castle Hill first.
(If you are coming by foot, get directions which lead you to the elevator for the last seven stories or be prepared to walk up a lot of stairs.)