I stayed with some friends at Priscilia's apartment for 5 days. It was very central and near the river. You can reach all the important touristic sights by walking and bairo alto is very near for a great night out. The apartment was very clean, modern and spacious. Pricilia was super kind, helpful and provided us with a lot of information. She also prepared a list with non-touristic attractions which were great!
We can warmly recommend this apartment of you're looking for a nice and relaxed stay in Lisboa.