Luis' place was perfect for my first Lisbon experience. The apartment is in a great location, walking distance to great restaurants and nightlife but still far enough away that the neighbourhood is quiet at night so sleeping wasn't a problem.
As with many older buildings there is no elevator and a fairly narrow staircase which is not a problem, just requires a slow, steady pace when lugging heavy suitcases up the first time. The advantage of being on the top floor however is that Luis' apartment has a great rooftop terrace with views of the river. Other guests have pointed out as well that this terrace is accessed via a ladder, and therefore wouldn't be suitable for all guests. We loved it though and it's a nice spot to sit with a bottle of wine as long as you can still negotiate the ladder on the way down :)
The bedrooms are great, especially the master. The second bedroom has a bunk bed and is therefore better suited to children or singles.
Much appreciated amenities were the high speed wifi, soap and shampoo in the bathroom, hairdryer, washing machine, iron and ironing board and umbrellas which we unfortunately needed.
Would definitely recommend Luis' place to anyone wanting to explore Lisbon.