This is a fantastic apartment in an amazing location. For being so near the Baixa-Chiado station and Largo do Chiado, there really isn't any noise from the street. And the inside of the building is a work of art in itself!
There is occasionally an unpleasant smell in the building/bathroom, but it's rare enough that it definitely didn't affect my view of the place. The next time I'm in Lisbon, I'm absolutely checking for this apartment first!