We were greeted by the lovely and kind helena when we arrived at the appartment, which might I add is a mere 5 minutes walking from the nearest train/metro station. She welcomed us into the appartment and quite clearly explained where in Lisbon we were and how to get to certain places in the city which she, and I quote: "would definetly want to see if she was a tourist". She explained how everything worked inside the appartment like the airconditioning unit and the firepit. She also clearly explained and answered all of our questions we had sent in an E-mail and did so very clearly. The appartment itself is in a very central location, close to the downtown area Chiado and near the trainstation of Cais du Sodré. Also nearby there is a little park with an indoor foodmarket where you can have all kinds of foods from different nationalities as breakfirst or lunch (and maybe dinner but we havent tried, I wouldn't have dinner there anyway, there are much much nicer places withing walking distance). There are lots of shops in Chiado so if you like shopping you're golden.
There were a few downsides however, one thing is that in order to walk somewhere in Lisbon you have to walk up a lot of steep hills, so if it rains watch out! It gets slippery. Another thing was that the stairs leading to the appartment are quite crooked and look like they want to kill you, Helena and her husband can't to anything about that but it deserves the 'buyer beware' sticker.
Two more thing before I forget, there is a little supermarket nearby (1 minute walking) but it doesnt have a large assortment of items, just the basics so be aware of that.
And also tall people beware! Im 6"4' and I have to duck in order to get through some doorways so be mindful of that.
All in all I would rate my stay at the appartment a 9 out of 10, not perfect though that may be personal taste but still really really teriffic!