This is a great apartment in an excellent location for people wanting to explore Lisbon, especially if you have only a short time in the city. My only real issue is that it's on the 5th floor, which can be a tough climb while carrying luggage.
However I must mention we had major problems with the check in. While the front door is unlocked easily with a code, the actual unit key must be picked up at an affiliated cafe nearby. We weren't told of this cafe's hours, but it was closed when we arrived in Lisbon in the late evening. We were locked out of the unit for over an hour and had a lot of trouble getting in touch with someone who could help get the keys. Once we eventually got inside, it turned out it hadn't been cleaned since the last guests. Someone really dropped the ball here.
Fortunately once we were able to directly reach Iago, he was extremely helpful and accommodating, offering to book us a hotel and refund our stay as well as quickly sending over someone with fresh sheets and towels once we declined the hotel. No issues after that.