We really liked Cláudia's place - it's on the ground floor, quite spacey, a big living room, a very well equipped kitchen and very stylish bedroom! The apartment is located in a hip neighborhood, many nice cafes, breakfast places and intriguing bars. It is very close to the very historic center of Lisboa as well, just a 10 minute walk away.
Cláudia is very easily to be contacted with, she gave me lots of local tips in advanced and the arrival instructions were very clear.
A big YES recommendation for a wonderful stay in Lisboa :)