A friend and me stayed in Luis apartment during a trip to Lisboa for a few days; it's situated in Alfama, right up on a hill (there's lots of those in Lisboa ;)) and with a wonderful view towards the Pantheon, looking over the city. The apartment is cozy and small (one bedroom with double-bed and adjoining bathroom with toilet; there is a fully equipped kitchen (with toaster, orange press and kettle =)) and it opens towards a living room with a table to eat at and a sofa and a TV. The bathroom is a bit small and for somebody bigger than us girls, the shower might be a bit small, but this was really the only "problem" (which is overstating things) we had, together with the shower-head that would not properly stay up there.
The bed was comfy, the apartment and water warm and Luis had even provided us with a welcoming snacks of Portoguese cheese + sausage and Portwine, which was really great as it meant we could have a lazy evening when we arrived and just enjoy. There was even some fruits for us! =)
The location of the apartment is great, several things are within walking distance (you'll gain some leg muscles here with all these steep hills, I can tell you that much ;)), and others like Belem you can reach easily via public transport. Luis was super nice and even helped us to arrange transport to the airport for the last day and allowed us to leave our lagguage in the apartment until we had to leave, which was really great!
We greatly enjoyed our stay here and would come again! =)