I started off with a Shoot'n Chrony many years ago. It worked as advertised, and was much better than nothing. But, it was a PITA to set up, which discouraged its use at busy shooting ranges.

I switched to a Labradar last year. It is super easy to use! It is so easy, I now pretty much always collect velocity data whenever i shoot from a bench.

[Linked Image from photos.smugmug.com]

[Linked Image from photos.smugmug.com]