The pass was well worth buying and I would highly recommend it to anyone visiting New York. Collecting the pass and then using it at the various sites was easy and the same day night trip up the Empire State was a fantastic bonus.
Using CityPASS was very easy. We started at the 911 Memorial. I handed the downloaded papers to the ticket seller. She handed me a City PASS booklet, with the 911 ticket torn out. And off we went. Some places even had separate shorter lines for people who already had tickets or PASS books. Everyone seemed to know what CityPASS was. And we were able to get the 5 discount when we wanted to do both the Guggenheim and Top of the Rock. I will use this again, probably in another city.
Everything ran well. Easy to exchange the tickets.