I'd argue the extra $15 for Global Entry is worth it, if you're considering signing up for a Trusted Traveler program. You can go from landing in the US to curbside in single-digit minutes, and even if you don't often fly internationally, skipping one gigantic miss-your-connection-long line is worth it.
If you live nearby (or can easily get to) a Canadian border point, NEXUS is an even better value. $50 for five years, includes Global Entry privileges, and you get expedited access in and out of Canada - dedicated lanes if you drive, Global Entry-style kiosks if you fly. It can take a month or two for your interview however as both governments have to approve you.
I do have mixed feelings about forking over money to a system I would much rather see replaced or overhauled. However, considering how often I've flown in the last couple years, my NEXUS membership has absolutely been worth it for Pre-√ alone, and the times I've used NEXUS/GE have been equally handy.