Works great, but needs some distance - Competition Electronics Prochrono LTD

I use this in a semi-open range (roof and back/side walls) to measure my handloads and match velocities on antique military rifles. One thing I learned, which may be the same for other brands, and should've actually read in the manual, is that you don't want it right up close or the muzzle blast confuses it. So I can't have it under the roof even though I spent the money on the indoor light kit. Other than that, it works well. Pretty sturdy, I hit one of the sticks with a 22 round once (cursed windage adjust rings), other than having to bend it straight, no damage. Also it being almost knocked over by the fireball when I tried to measure a 75 grain black powder load a foot away didn't hurt it either.
It's nice how it saves the strings after turning it off, so you can write everything down at home, and how you can delete individual bad shots to get them out of the AV/ES/SD calculation. Still on the original battery after maybe twenty hours of use. I'm happy with it, though maybe I should've spent a little extra on the bluetooth one.