Goncalo's place was great. It was cosy, with a lovely view out to the water (we especially enjoyed watching the big ships leave the dock at night from our table) and very clean and comfortable. Goncalo was an excellent host, very communicative, quick to respond, and there to meet us when he said he would. The apartment itself is well-situated for wandering on foot into the city, but also very close to a subway station for jaunts further away. Just be aware that if you have mobility problems, the stairs up to the apartment are quite narrow and steep, so wouldn't suit someone (for instance) in a wheelchair. It was good exercise, though, especially after sampling some of the local restaurants!
We loved it, and wish we could have stayed longer. :)