Sarah & Pedro's place is very nice. It is 5 minute walk from a metro station and a 15 minute walk from the Square of Commerce. It is a nice and cozy place, great for a couple or close friends. The place is small so it's great if you just need a place to sleep and have a quick bite inside. The internet connection was patchy so not great for work, especially if you need to do calls.
Communication was great with Pedro and Sarah. We had massive flight issues and they were very flexible with our check-in situation. Overall, it is a great stay and I do highly recommend it for enjoying Lisbon.