I have a hundred of them and use them all of the time. Love them.

I find they add a real safety and convenience factor to my range sessions. For example, if I plan to shoot five shots of a certain bullet/powder combination, I lay out five bullets and powder tubes on the bench. Even if I get interrupted in the loading sequence a quick glance at the bullets & tubes will tell me where I stand. It's almost impossible to dry load a bullet when it's sitting next to a full powder tube.