Great location in Alfama. You can walk down the hill to cafes, restaurants, Museu do Fado, the National Pantheon, military museum, etc. You will be walking (or ridesharing, biking, scooter-renting, whatever) on Lisbon's many hills, so be prepared! But this is true no matter where you stay in town, especially in the historic districts.
The photos are 100% accurate. Check-in was easy and painless. The place is not big, but it has everything I needed. Lisbon gets hot, and the apartment has no A/C, but it is on a corner, with pretty consistent cross breeze. The rooftop view is a very nice panorama (from a tiny viewing platform, about big enough for one person to smoke a cigarette).
Alexandra is a considerate and responsive hostess, and it will be easy for you to settle in and enjoy your stay in Lisbon.