Lost Chiado house is really perfect for my big group - centrally located, big and spacious, clean and meticulous. Unfortunately, my experience was tainted with SERIOUS communication problems.
We booked the place in Oct 2017 for Mar 2018. Unfortunately, the host never replies to my messages. I had to call and email them, only being told that someone else is responsible for Airbnb communication. Even for 2-3 days before check-in, I still have no confirmation. It got to the point that they don't reply to my message when I offer copies of our passports. Because of the lack of communication, we always have random cleaning people, hosts, and the next guests in our flat, which leave us feeling unsafe and impersonal. If the management could improve their communication, this Airbnb would've been perfect.
Sadly we have been rebooked to another house, the "Cais" house. It was not easy for a group of 18 people to live together as the apartment is not usable for a big group as it is normaly the rooms are rented seperately. The kitchen is not usable for a big group as there is no cooking possibility. The rooms are nice, good beds and matrazes. The bathrooms are mostly renovated and quite nice but the appartement itself need some painting in some areas. The loaction is really good, 3 minutes walk to cais do sodre metro station, supermarket is just a 5 minutes walk. The rooms especially to the main street are quite noisy as the windows are originally wooden and only single glassed whereby the rooms to the other side have been changed into double glass with plastic windows. Also you can darken these rooms quite good whereby the rooms to the main streets only have roller blinds. The host are all very friendly and tried to fix the problems in the apartements as quickly as they could. So at all i can reccommend Lost Lisbon as hosts but cannot recommend the Cais-House for a big group. We cannot say something about the Chiado-House, but looking at the pictures it seems that this apartment is more recommandable for groups.