Originally Posted by Kiraly

Sure, but instead of standing around in the immigration line, you then have to stand around at the baggage carousel to collect your checked bags, which aren't arriving any sooner than anyone else's. Six of one, half a dozen of the other.

It's more useful when departing, when the NEXUS card gets you to the short line in security. And it really shines at the land border, when it can save you hours of time.