Highly recommended. With Multiple kinds of bikes to rent, you can definitely find what you need. The road bikes are quite speedy and efficient. At $30 for the day, you really can't go wrong. They give you a full 24 hours. We returned ours the next morning.
There's no confusion when renting from this place. The kind lady was clear when laying out the rules/regulations, complete with a map and understanding that bike-riding is not tolerated on the sidewalks in the city. She told us which roads to take and which to stay away from (busy streets with no bike lanes). Also a good middle location between Golden Gate and Fisherman's wharf so you don't have to tire yourself at the end of the day.