I have Pre-Check. My DH and DS do not (Pre-covid I was flying more so I got it.)
We flew from MSP to MCO in the middle of April and it was evident what a time saver it is. (Sometimes they get Pre-Check if we are flying on the same itinerary but for this particular trip we were using a combo of my credit and miles to pay for tickets so it ended up they were on their own ticket from me). We arrived at MSP during the early morning rush and I had a bag to check. They proceeded to TSA while I got in the crazy long line at Delta. After shuffling through that and then heading to security, I was able to walk right through with no line. They were just getting done themselves. Same on the way back - they went to TSA while I checked my bag. This time it was late in the day and there was no one else at Delta (no one! So weird!) and security didn't have long lines. However, I still got through security at the same time as them even with having to walk through the atrium, talk to the Delta folks, and then double back through the atrium to security.
I think if we all start traveling more after COVID we will look at getting them Pre-Check as well. Totally worth it to not wait in long lines, not having to take shoes off and mess with all that stuff. So less stressful.