I have pre-check, but a couple of times the designation has not come through on my boarding passes. It's those times that I realize that I really like not having to take off my shoes (and sometimes my belt as well) and unload my laptop (in addition to going through a longer line). On the other hand, more than several times I have gone through the regular line when PreCheck is jammed and the regular line is almost empty, but at least I have the choice.