We (3 friends) stayed at Nunos and Raquels appartment for one week end of january 2016, and we had a great time! Nuno and Raquel are both lovely, Raquel even left us a bottle of (tasty) red wine as a welcome gift :)

The flat is very cozy, with everything you need, the kitchen is equipped well enough to cook a decent meal and the beds are confortable. The location is also a great plus, walking distance to most of the touristy attractions and a metro station is very close by.
There are two bedrooms, one with two seperate beds and one with a bigger single, so if you plan to stay there with 4 people, be aware of that, if neither two of the guests like to cuddle up in a single bed ;)

I can absolutely recommend the flat and I would like to thank them for a fantastic stay :)