First of all I have never EVER met such a great host & I've used Airbnb many times. Helena is one of the sweetest, helpful and kind spirit. Anything to help, too many things to mention ;-)
The apartment itself and rooms all spacious with everything you need & attention to detail. The bed was comfortable, I appreciated being able to darken the windows completely after a late night out ;-)
It's located 7 minutes walking to the metro station & a bus stop is right under the apartment. Personally I walked to some places, used the metro (3 stops) if I wanted to grab the train for the beaches at Cais do sodre & used taxi services at night (uber) which costs almost nothing if you don't feel like walking ;-)
The neighboirhood is a mix off all breeds and I felt safe. A cafe downstairs will provide a coffee & cheap local food when you dont feel like cooking. But supermarkets and plenty of restaurants nearby. I didn't mind the 4 floors walk up & a nice extra is the rooftop above you where you can sit for a while with huge view over Lisbon.
All in all I highly recommend this place & its host and I will be back ;-)