Unfortunately, I cannot tell you about the Opera Apartment because the management company (Rent Experience/ALTIDO) gave us the wrong door code and we could not get into the apartment. No one answered the phone, responded to voicemails or messages via the Airbnb app and we had to find a hotel at 1 AM, after 2 hours trying to contact Rent Experience/ALTIDO. No one contacted me during business hours later that morning either. We had to find a new Airbnb for the rest of our stay and I cannot wait to give this new place glowing reviews as they have been extremely responsive, unlike Rent Experience/ALTIDO.
I would not book any property managed by Rent Experience/ALTIDO in Lisbon until they hire competent staff who will respond to emergencies 24/7.