★★★★★ for remote work and long-term stays. You won't find any better place in Lisbon. The layout of the house makes working very convenient, since it is possible to have a dedicated area for work that is separate from the living area.
The house is located in walking distance to the Campo de Ourique neighborhood, a lovely somewhat upper-class neighborhood with lots of shops, restaurants and cafés, where you will see older men and women coming together in the park, drinking coffee while their nephews and nieces are playing nearby. They don't get a lot of tourists here, which is a big plus. Other areas in Lisbon can get so many tourists that it's extremely annoying; but not this area. Behind Campo de Ourique is the Amoreiras shopping center, with e.g. electronic stores.
If you're staying during the winter months, like I did, keep in mind that houses in Mediterranean countries don't have insulation and that it therefore gets chilly inside, too. Also the humidity in these countries in winter is much higher than in northern European countries – so high that they use dehumidifiers inside (there is one in this house as well). There are radiators in the house and blankets, so overall you will be able to work comfortably, as long as you wear warm clothes. Due to its north-western orientation the house probably doesn't get as hot during summer as other houses do.
David was a great host that helped me out a lot and was always very responsive. I really fell in love with this gem of a house and would come back anytime.
Some highlights:
= The House
– three stories: work, sleep/bathroom and living/kitchen/terrace
– fully equipped kitchen
– with big refrigerator, freezer, dishwasher, washing machine
– fast reliable internet
– big terrace with bbq grill
– very comfy sofa
– cleaning service
= The Area (Campo de Ourique)
– quiet, peaceful and "richer" neighborhood
– tram connection (lines 28 & 25) to downtown and tourist areas
– several supermarkets, bakeries and a market hall
– two beautiful parks in walking distance
= The Host
– great and very friendly communication
– very quick fixes and help