It works!
I conceal-carry for work.  So I have to buy pants one waist size bigger then I need.  But if I get them too big they look to "baggie".  And sometimes they're still a little tight when I first put them on after being washed.  This thing stretches the waistband enough over night that I don't have to "break them in" in the morning before putting the holster in them.
Rating: 5 stars