Carlota is a great host, she did everything to make our stay comfortable, even though we had some special requests. Her tips are good as well, make sure to check them out.
The apartment is clean and bright, and has all you might need. The bed is comfortable and the WIFI is fast. Bairro Alto is a really nice area, centrally located and with plenty of restaurants and cool bars to choose from. It is indeed noisy at night so if you want to sleep with the windows open, I'd advise to bring earplugs.
I would highly recommend this apartment if you like to stay in a lively and central area, but also enjoy the comforts of a modern apartment.