Another CE Pro Chrono user. See a trend?
Afforable, easy to set up, easy to use. Mine's been fairly accurate compared to what I chrono at home vs what I get at the Chrono Stage at major matches. Usually within +/- 1 PF.
This is worth noting, as apparently some chronos have an interface designed by, well, engineers, possibly influenced by Rube Goldberg.
I've heard this about Shooting Chronys IIRC, among others.
The Pro Chrono interface is pretty darned simple - on/off, string change/next, string review, delete shot and delete string. No instructions needed.
The Caldwell with it's latest software is a bit more effort, but completely different interface being on a phone or tablet, but still, pretty simple.