Rodrigo was very prompt in his communications and gave clear instructions for locating the apartment and checking in/checking out. I was only in Lisbon for 2.5 days, and so I spent the majority of my time out of the apartment and exploring. The apartment has helpful amenities like a fridge, coffee maker, and clothes washer. It is a little smaller than the photos suggest, but that was not an issue for me as a solo traveler, and I think that's to be expected given the city location. The apartment was pretty clean, though I would not rank it as sparkling (but I'm a clean freak, so that's probably just me!). The one suggestion/improvement I have is regarding the bathroom. It's a very small space, which was fine for me, but there was a distinct smell of mold/mildew coming from the shower curtain (visible mold at the bottom) and perhaps the bathroom in general. It's easy for water to collect on a shower curtain, so that's a relatively easy fix. The design of the bathroom does make it hard to keep shower spray just in the shower, so I suspect that that contributes to the smell as well and might be harder to fix.
Depending on what you plan to do in Lisbon and what your priorities are, the apartment may or may not be in your ideal location. I prefer to travel on foot when possible, and I did find that this neighborhood was farther away from some of the sights I wanted to see, but the longest distance from the apartment to a location I wanted to visit was about a 40 minute walk, which really isn't bad. There was also a bus station very close by which makes transportation easier. If you are someone who prefers to walk everywhere, something closer to the Rossio Station or Alfama neighborhood might be better. All in all, I would recommend this airbnb for short stays when you are spending most of your time exploring. It's in a quiet neighborhood with excellent wifi signal, and it felt very safe. Nearby bus station was a plus and again, Rodrigo was very prompt in answering questions. If you don't mind walking a little ways, it's a good value for money.