Great location! Super close to the action but tucked on a side street with little noise. Short walking distance to the main train hub, nightlife, great coffee, shopping and the popular sites in Lisbon. Clean and fresh apartment with new appliances and fixtures in bathrooms. The kitchen/living room area are a bit on the smaller side and cooking gadgets are limited - which was totally fine for us as we were out for the most part exploring Lisbon's amazing food scene but something to keep in mind if you plan on staying in.
Also, super responsive and accomodating hosts - they were able to arrange for a last minute baby bed after ours was lost by our airline. Check-in was a breeze.
It is two flights of stairs up and the apartment is located in a hilly area (much like most of Lisbon!)
Overall a fantastic stay - will definitely stay again on my next trip to Lisbon.