This is an absolutely perfect spot for a couple! The flat was clean and tidy, not huge but definitely big enough for two. The bed was comfortable, the shower was good and powerful (others have said the bed / shower were too small but I am 6 foot 2, my partner 5 foot 8, and they were fine). There are loads of large windows which let in plenty of natural light (and air if it is a bit warm). The balcony has the most amazing view, perfect for breakfast or an evening drink!
It is on top of a hill as others have mentioned, but this shouldn't put you off unless you have accessibility problems. It's a 30 minute stroll from the centre, which is a lovely walk to take through beautiful Lisbon, though I can't speak for the local transport system (we often got an Uber back as they are super cheap compared to London!)
André was super quick to get in touch when we arrived a bit earlier than planned, and check in was easy.
All in all a great place that I would happily stay in again - you won't regret booking it! Thanks André!