Staying at Maddie's place was overall a really good experience. My friend and I stayed there for six nights in May 2018.
I can't fault check-in, Maddie was expecting us and right there when we got to the door. She showed us round and we were appreciative of the local advice.
The beds are fold out and very comfy, and the sofa can be made into a bed really easily, and Maddie showed us how to do it. Towels are provided as well as spare shower gel and shampoo, which is great.
The flat is located in a very busy part of Lisbon up by the castle, and the noise outside depends on the day and whether the bars are open. There is a very nice ice cream place a couple of doors down! Obviously it is Lisbon so expect lots of steps and plenty of exercise.
Unfortunately the main drawback for me was that I ended up having two showers that were cold. Maddie did come round when we first contacted her about the problem, but were told the gas hadn't run out and that we weren't using the shower correctly. We didn't receive an apology and even felt a bit told off when we asked for it to be fixed. It was eventually fixed midday after our second night when the gas was changed.
Despite this issue, I'd still recommend staying at Maddie's as it's really central and comfy. I would say four people would definitely be a squeeze, but if you're outdoors you won't mind too much. Thank you Maddie.