We had a great stay at Paula's place. This apartment is very cute, modern, spacious, and well-equipped for a short stay. We were six people and felt quite comfortable in the apartment. The heating works fantastically, the kitchen has all the appliances you might need, the internet is fast, and to top it off the apartment has two bathrooms!
Our communication with our hosts was stellar - no problems there.
And finally, the neighborhood where the apartment is located is super central to all the great sites in Lisbon and also to public transportation. It was a breeze to get around.
Just note that the apartment is on a fourth floor walkup if you're coming with lots of bags! But our host was kind enough to help us get them up to the apartment. Amazing! I'd highly recommend.