interesting Marcroman! Thanks for the input!
I have only used it once so far, and it gave velocities within 10 fps of my old Chrony. That translates to less than 0.5% difference between the two.
aligning the sights on the unit are straight forward. I guess When I get the chance to stretch the velocity information out past 1000 yards, it will start to show up if there are any problems with accuracy.
when it comes down to it, I suppose that if the "Chrony's" are not parallel to the bullets path, they would also produce somewhat erroneous information. Like any precision instrument, the setup is everything.