Maria's apartment is in a great location in Porto, easily walkable to all the major sights and attractions. It is clean, secure, quiet, and offers a great view of Porto. The Internet was very fast (100mbps up and down) which made it easy to work. Maria was responsive and accommodating, with clear instructions for everything. As others have noted, it's on a steep hill but I found it relatively easy if you approach the street from the top vs the bottom. The space is simple and compact, but works well for a solo traveler or couple for a couple days.