The hop on-hop off option makes getting around to the major sites a breeze. I was there in the off season so not all sites were open, check in advance if there is a must-see on your list. Hugo was a friendly, engaging, informative, and entertaining guide! Some others give the "canned" tour, but still informative. Keep in mind that the stops are not very clearly marked due to city ordinances, they are small signs on a pole that say something like "city tour stop" in small print toward the bottom.