Posted October 3rd, 2017, 05:41 PM
In SF all I can personally comment on is the one that comes with the Go Card (Big Bus) - since it was included, it was the one we used! One bus was seriously old and in dire need of renovation - the upstairs floor flexed alarmingly next to a seat that was covered in yellow warning tape, but the other vehicles were in much better shape. 2 good guides, one great, one OK of the four buses we rode.
Princess: Emerald, Golden x3, Island, Star x2
NCL: Gem, Pearl
Edumacational kiddie cruises: SS Uganda