We stayed at Samuel's apartment for about a month - the trip was part business, part vacation. The location is wonderful, my favorite neighborhood in Lisbon. Quiet and residential but super close to some of the best restaurants and shopping. The apartment is very spacious and well appointed. The bed was comfortable, the shower worked great, and the kitchen was big enough that we could make several decent meals. Samuel was always available by email or WhatsApp and checked in on us frequently. The only caution I would give is to those who are sensitive to the cold - in the winter, there is no heat (although Samuel provided two electric space heaters), and it can make the apartment feel a little cold and damp, particularly on rainy days. I imagine this isn't a concern during the sunny summer days in Lisbon!