First of all, the appartment is really amazing, super modern, cozy and clean. The location is also great, anyway Principe Real is my favourite neighbourhood:)
Second, Cristina is a suuuuper amazing host. She has a whole folder with tips about Lisbon prepared in the appartment plus she's super helpful with every question you have, I even got the chance to shortly meet her in person. And really she's super nice:)
I've been to Lisbon many times and stayed in many different places, and this one was definitely my favourite. Would really much recommend!