I have a shooting chrony beta-master (masterbeta?
). It's one of the cheaper models. You pay a little extra over the base model to get the readout on a cable that you can set on the bench rather than have to get the numbers off the chronograph. I think it's worth it.
I've never used any other chronographs, so I can't really compare it to other more expensive models. I can say it doesn't work in dim light. On a sunny day, I can see well enough to see the target at 100 yards a half-hour before sunrise. The chrony won't work until sunrise.
I'm happy with mine. Cost around $90 when I got it in '08. But it's got limitations.
Be nice to see a study that evaluates different chronographs. I'd like to see how they all compare if lined up in a row and measuring velocity on the same bullets.