The apartment is listed as a loft apartment but it is in fact on ground level. The instructions to get the key were clearly given by the owners with pictures and street addresses of where you need to go. I arrived later in the evening with my mum due to arrive the next day. I found the apartment and was relieved to get shut inside since the streets around seemed to have a lot of homeless and I felt quite uncomfortable trying to get into the apartment and get the door shut. My friend who lives in Lisbon advised that the Martim Moniz area which is close to the apartment is not the safest. I ventured back out to get food and didn't feel great walking around. Sleeping alone that evening wasn't great with lots of noise outside. There were bikes going up and down the lane outside and what sounded like carts full of empty bottles being pulled down the lane to the recycling bins. To get a sounds nights sleep take ear plugs, that was the only way.
I asked the hosts to make up the sofa bed with my mum and I staying there together and they were quick to respond and have the bed made up for us. In fact they were quick to respond on any questions.
The area itself is vibrant during the day and there are quite a few nice cafes and it is only a short and enjoyable walk to Castle Sau Jorge. Ubers to other places are cheap or it is a short walk to other interesting areas. The apartment is good value for money and clean. It would be fine for a couple or male visitors. I just wouldn't recommend it for a loan female.