Learned a lot. There is a lot to see and do with this card; however, getting there in the limited time of when things are open is a challenge with traffic. Plan what you want to see & do before you buy this card.
A) The card uses the City View Hop On/Off Trolley - it is easy to be confused with other tours and trolleys. This trolley doesn't really follow the Freedom Trail and runs opposite from the typical path of Boston Common to Bunker Hill. One driver was correct, it's easier to start @ Bunker Hill and go into downtown; most tourist start @ the Commons. While the City View Trolley did it's job of getting us back to the Commons (near our hotel) after our tour of the USS Constitution, I give the trolley a rating of (2 out of 5). (1) Rude drivers (2) You have to go down to the NE Aquarium to start the use of the trolley; I didn't understand this. (3) The trolley flows in a circle from the Aquarium to Boston Common and around - it does not go into other areas as other trolleys may do. (4) Some drop off/ pick up points are poorly marked and the trolley may not stop if no one is visibly standing at the exact stop. (5) The drivers were not very friendly and wanted to complain about ugly city hall vs talking about history or sites. I was hoping this was a tour not a bus with drivers that are tired of being around too many people.
B) The Freedom Trail can easily be walked from the Commons to Bunker Hill during the 9 to 5 in which most things are open. I highly recommend the Freedom Trail: History Tour with a guide for the first leg to Faneuil Hall . There is an info center @ the Commons. For our trip, the first tour starts @ 9:30 am from the Commons to Faneuill Hall. The State House entry & Paul Revere's House entry is included in the Go Boston Card. North Church/ King's Church entries are not included. I highly recommend the Freedom Trail walk; plan on using the whole day with dinner @ the Warren Tavern at the bottom of Bunker Hill for a fitting conclusion to a great history tour.
C) New England Aquarium was a great visit; however, we started with a Whale Watching Cruise. High Recommend Both! However, if I planned it better, we would have done the later cruise and see the aquarium first. Seeing whales, as I understand, is close to 100%. We had the excitement of one breaching at 50 yards to the starboard side of the ship. While the day was a cool 67F with constant rain, we were quite comfortable inside the galley. Seeing whale up close was a highlight of our trip to Boston... a most memorable experience. P.S. There is hot chocolate or coffee on board for $2; take a little change and a parka. The Aquarium was included; however, the whale watching was not.
D) There were a lot of additional things we would have enjoyed to see on the card; however, there isn't enough time for a two day visit. The Freedom Trail was Day (1); here, the hop on/off works if you are traveling from Bunker Hill to The Commons. Going the other way is waisted time. Day (2) One doesn't need the Go Boston Card to whale watch and spend a day at the aquarium.
E) I see the rave reviews about savings... we would have been better with a different plan.