Susana and Diogo were incredible hosts! I was in touch with Susana in the days leading up to our stay, and she gave us recommendations for restaurants and activities, and even helped me get a cake for my husband's birthday celebration! We rented out the lounge area on the ground floor (which I decorated for my husband's birthday) for our group of 20 people, and they had a speaker and projector available for us. We paid for the additional brunch service, which was quite nice for our group to get together each morning before exploring Lisbon. They offered to also set up drinks for us, but we had brought our own.
In terms of the location, Uber is SUPER cheap (literally 2-5 Euros to anywhere), so the location is not at all an issue (and we actually went for a long walk all the way to Praça do Commercio from the house).
As far as the actual space, we rented two apartments, each with 6-7 bedrooms and a small living space. Even with 20 people, there was no issue since many rooms had en suite bathrooms, so no more than two bedrooms had to share a bathroom at any point.
This was a great find for our very large group, and I highly recommend it.