My wife and I went for 2016 New Years for 5 days. We enjoyed the city. San Francisco has lots of options and plenty of public transportation. Make sure you have cash and exact change to pay for buses or use Muni vending machines to get your tickets. Food options are endless and for all budgets. If you are a food adventurer, we recommend to explore Mission St. (take the Bart to 16th & Mission) lots of options from all over the world. Some places can be packed so call ahead of time to find out or reserve a table. Coit tower, the piers, Palace of the Arts, Golden Gate Park and Bridge are must visit sites. Be ready to walk a lot and going up/down hills.