I have bought the Citypass in both San Francisco and Philadelphia and thought it was a terrific bargain in both. I also know of someone that bought the Seattle package and they really enjoyed that one, too. They make their money off people not going to all the attractions in the package, so if you prove them wrong and make it to everything then you can save a lot of money. The real value of them varies from city to city, as do the privileges (i.e. transportation was included in SFX, but not in PHL), but overall they are great. Totally legit.