The Annex is a very nice place to stay.
It has a great garden, where you can have breakfast in the morning and relax in the sun. We had good weather!
When it's rainy and cold, the Annex will be less comfortabel, because it's a little humid and there is only a fireplace to warm up.
When you have a car, the Annex is a good base to explore the environment. There is a nice coast, beautifil villages (Sintra, Cascais, Ericeira etc.) and of course Lisbon! A great City.
We had a great holiday! And the portuguese are very friendly!