Sérgio's apartment was very nice. It was spotless and well stocked for our rather long stay. Joana checked us in and explained everything very well to us. Joana also answered promptly any follow-up question we had after the check-in. Sérgio contacted us a few times as well to make sure we were good.
The apartment is in a great location, walkable to all of the important areas of the city. There are also many restaurants close by and a large, upscale mall (with a really nice grocery store inside). The guide book is the best and most extensive I have seen which also included all the information and instructions for the appliances.
Also, if you are cooking in, the kitchen has very modern equipment and is also well stocked with place settings, utensils, etc. You can't go wrong at this apartment.