Location, Location, Location.
Perfect for buses, taxis, Trams and walking.
Just brilliant.

The concierge was essential as were the maps.
We'd have used the Muni more if there was a decent map.

Homeless people all around was a put off.
But the vibe of downtown was good as were the restaurants.
So much choice.

I think I'd rather do a Segway tour on the first day than Alcatraz to be honest as then another can be done and areas covered, whereas Alcatraz is one thing.
That said our day had great weather and views but the alternative wouldn't have??

Golden Greast Park is very very good as is both the Academy of Sciences and the Art Building opposite.
The real find was the 9 story observation deck on top (free), excellent.
San Fran is a great place and will come back sometime, as conferences held regularly.