Madalena & Alexandre are excellent hosts: friendly, never intrusive, they even pick you up from the airport(only a 7min drive).
The house really looks like shown on the pictures, spacious, clean pool, fully equipped kitchen, fast Wifi, LED TV and a good hi-fi system, washing machine, enough space to sit and relax...
There´s a city guide book and a list of sightseeing and restaurant hints available.
Next Metro station is Roma (the green line) which is fro my point of view the best line to get everywhere. If you order a taxi, make sure they come to "Rua Alexandre Rey Colaco no. 2", otherwise the drivers might not find it.
After a 10min walk you can get to Alvalade where you find supermarkets like Lidl and Pingo Doce, as well as a market hall to get fresh meat and fish.
The price might be high, but it´s definitely worth it :-)