Fwiw.... I am the lucky gift recipient of a Labradar setup recently.
I had been using a pro chrono pal for a long long time with great success. I had read a review of a while back that was pretty in-depth and supposed to be very scientific that said the pro chrono are very consistent but usually over read by about 20 FPS. Turns out my lab radar and my prochrono read almost to the exact FPS every time.
Just about got the labradar all figured out for how to review things etc....and where to place on the bench. So far it's a very sweet setup but for what it costs I hope it stays that way a long long time!