Pretty sure they all do random start and par times.
I see more Competition Electronics at matches than any other, Pocket Pro 2 is overtaking the original, but there's some reason I can't recall some folks prefer the original. I have the 2, it's been flawless, batteries last a year or so if I keep the backlighting off, that's 2.5-5 hours of run a week. I'm happy with it, easy enough to use, if I had to gripe it'd be that the sensitivity doesn't go low enough to catch hammer drops in dry fire, I don't need that, but tried it once to see if it would.
They can all be killed, but I see way less Pacts in the wild but at least 50% of those have been malfunctioning.