A well lived-in upstairs appartment in a residential district about 15 mins from Sao Sebastiao and Entre Campos metro stations, from where there is easy access to the city centre. Although I didn't get too much chance to talk to her from our few conversations I could see that Lia is very friendly and welcoming host - very happy to help with local tips and any issues with the appartment. There is a nice sunny workplace behind the kitchen. Overall, very good value for money for this location at the time of year I was there.
It is, as I say, well lived-in: not all the facilities are very modern, there are always other people around who you will share the one small bathroom with and Lia has two (very well-behaved) dogs. So this place is great if you want an authentic Lisbon experience; probably less ideal if having lots of space and modern facilities is important to you.