The house is very well located, walking distance to Santa Apolonia, with trains, buses, taxis and metro, and close Praça do Comércio. There's also a supermarket two doors down with everything you need. The house is very and spacious. We were in a party of 11 and it was perfectly sized for us.
It's an old building though so there are some quirks. The oven/stove sits on what looks like an old fireplace. So it's too tall for comfortable cooking. If you're cooking on a tall pot at back hob, you literally need to step inside this "fireplace".
Two of the toilets broke down while we were there but the host responded within hours and sent someone to fix it on the day. These toilets also have a really foul smell of sewage (normal in old buildings) but the view to the Tejo from these toilets was outstanding.
Again, like old apartments we can hear a lot of the noise coming from upstairs. For a while there was a group that would come home at 4am and continuing partying. It woke all of us up (ages from 2 to 80 years old). I complained to the host and again the problem was solved (or maybe we got lucky they were leaving on that day).
The sofas and armchairs need some upholstery work, as they were uncomfortable but could fit us all. The bedding, matresses and pillows were good.
The view from the apartment was fabulous, the noise from the train station was mild and generally very low between 11pm and 6 am.
In all we would stay there again.