I've used other stencils, and I've found the Propeller stencils last longer.
I've also had good results leaving them down as a target. People seem to avoid running over a stencil that's left in place.
Here's the difference I've seen:
Location marked with stakes and flags: these still get run over. That's pretty normal.
Stencil left down as a target, with one stake in the center and two corner hooks: so far, nobody has run over one.
Fewer problems on site means Propeller is my pick.
Thanks,
Tim
VORTeX..South Florida Excavation.FL