Just a side note to add about scanning the wristband for a ride's fastpass line or entry into a park: it's a two step process where you put a finger on a finger print scanner and then move on to scanning the wristband. If both are successful, you're let in.

Oddly enough, the fidelity of the fingerprint scans wasn't high enough to read 2 of our party's members, so it was an slightly annoying process having to wait for a supervisor to come over and officially clear them.

The process was seemless for the rest of the party (i.e. 10 people).