This loft is great! Great location in the heart of Bairro Alto, one of Lisbon's most exciting areas to absorb culture, nightlife etc. Dianka was extremely helpful as well, accommodating my check in requests and promptly answering questions I sent. Overall a great visit, I would stay here again.
A couple of minor things about the flat to note though:
1) it is at the top of a 5th floor walkup. So if you wouldn't be comfortable with the stair walks, or have particularly heavy luggage, you may want to take note. I didn't mind it all personally though.
2) there is a church clock bell close by that dings periodically during the day (though not at night I think). But if that would bother you, take note. Other than that there is no street noise that I noticed.