Ok,
I purchased the crosshairs, they were easy to install, easy to sight and work great. As stated by Koon, easy to zero a project and check If a project will fit on a sheet. I am getting better use of my materials, and get better value from my scrap.
The price seems alittle high, but over time I'll get that back in reautilization of scrap material, and my time setting up a cut job.