This is a must-do tour of the city. My husband, 3 sons and I took the heart of the City 3 hour tour on our first full day in San Francisco and it was a fantastic introduction to this beautiful city. Daniel, our guide, was very passionate and knowledgeable about his home town. We felt like we got to see the 'real' San Fran as we travelled through the different setcors such as the Mission area, Castro, Hayes, Haight-Ashbury, the Civic centre, and the Botanic Gardens and Panhandle. The bikes were excellent and the service from start to finish outstanding, with contact kept re the weather and a follow-up email with restaurant recommendations.They even added the tour we wanted when it was not on their schedule originally.As promised, the hills were not strenous at all. overall an very professional but fun tour.