Scenic views, beautiful photography. Downside: lots of people walking, riding bikes, running, etc. Easy to get into a collision. Heading back to SF side you are facing traffic which is zooming by at high rate of speed only feet away from sidewalk (separated by railing but danger of flying debris if something were to come off the pavement onto the sidewalk--kind of made me paranoid). Other than that, it's a long walk, VERY windy most days and not for the feint of heart (although I have a fear of heights, it didn't bother me to walk over the bridge because it's so big and solid).