Normally staying at Libest, according to the host, they like to be there when the guest first arrives to give them a tour and answer any questions the guest may have. This is a wonderful idea and I wish more AirBNB's operated in such a way. My wife and I didn't get to experience this for our stay, but it wasn't for lack of trying. We just flew in town for a wedding and got hit by customs hard; over a 3.5 hour wait and we had a wedding rehearsal to be to. I reached out to the coordinator for our stay to see if we could skip the tour and they happily accommodated us by leaving a key, very specific instructions and even pictures that lead us into the space with very much ease. Couldn't have asked for a better check in experience.
Upon entering the space, we were greeted with a fantastic view over Lisbon as well as a perfectly clean and spacious interior. Plenty of closet space to unpack your things, a well stocked kitchen (no food, but that's expected), a cute little balcony to sit and overhear the life of the city or get a little bit of sun from the comfort of your newfound AirBNB. The bed was firm, but comfortable, the bathroom was spotless and well kept even providing a hair dryer that my wife made great use of.
The only downside that I saw was if I got really picky, so I'm not actually complaining and 110% would recommend this place to anyone staying in Lisbon. The shower did not have a door, so if you picked up the shower head there is a small chance if you have bad aim that it could go out of the actual shower and into the bathroom itself. Other than this however, the stay was flawless, comfortable and serene.
Stay here, you won't regret it one bit.
P.S. - There is an elevator, so don't be scared of a hike up a long set of stairs.