Isabelle has a lovely apartment! It is in a great location, with restaurants and cafes all around it. We arrived on New Year's Eve and had a fantastic dinner right around the corner at Fumeiro de Santa Catarina - it made our evening! I also highly recommend trying the coffee shop, The Mill, right next door. There is a bus/ trolley stop almost right outside the door as well.
The apartment itself if stylishly decorated, very functional, and has all the supplies that you will need for your stay, including a fully stocked kitchen. Isabelle often spends her time in Paris so she has a partner, Joana, who assists her with check-in, and Joana is very flexible and helpful. My flight was delayed getting to Lisbon and Joana was very understanding and able to accommodate.
My friend and I liked the apartment so much that we re-booked with Isabelle a few days later for our last night in Lisbon. I would highly recommend a stay at Isabelle's place!