The value of this Trolley ride was convenience. No navigating in a strange locale, no distractions to the toueist driver while taking in the sights. In two hours we saw highlights of San Diego. DONE. But there were a few negatives. The live commentary was regularly interspersed with extremely loud, cheesy sound clips from music and movie sources. The parking and bathroom situation in Old Town to get onto the Trolley were unpleasant. A few in my family were annoyed and bored with the experience. San Diego is beautiful and interesting, and this does give a tourist an idea of places to visit independently following day.