We really enjoyed our stay at Sofia's place. We didn't meet her in person but she promptly replied to all our messages. We could pick up the key somewhere close to the flat as soon as we arrived, and Sofia even sent us photos of the way to the place and to the supermarket to make sure we find everything. Her flat is beautiful and has everything you need, including basics for cooking. The streets in front of the flat can be a bit noisy at times, but if you keep the windows closed at night, you'll be fine. Only the neighbour's dog woke me up one night... Still, I recommend this flat to everyone as a base for exploring Lisbon.