We just had the precheck this past week on flights to Minneapolis. Getting this precheck is well worth the effort as it really minimized the frustration of going through the usual security vetting.
We always use pre-check and, as Scott stated, its a great time saver. I wasn't aware of the Trusted Traveler program, will definitely look into that. Our 3 kids and their spouses just provided us a 10 day, all expense paid trip to Ireland for June! :)