I've been using the Chrony for over 20 years and it works quit well. The upgrades allow you to store more information, get the controls up to the bench with you, download information to your computer and season your coffee in the morning.
Well, almost all of that.
Chronographs are fun. There is a controversy whether the chronograph made by X is more accurate than the one made by Y, but I don't pay much attention to that. I care that the accuracy be within the statistical deviation of the round I'm measuring and that the readings be consistently repeatable. So, if X brand says 2752 average for 5 rounds and Brand Y says 2735 average for 5 rounds, and the deviation is the same on both tools, I have the information, from either one, that I need to adjust my load (or not.)
Buy the best and fanciest you can afford and justify. They are worth it.