I've had several chronographs in the past 20+ years and of the budget units the Pro Chrono Digital is easily and without any doubt the best of them.
Never misses a shot, much less susceptible to sun angle errors, easy to set up, huge shooting area, and accurate.
Add the USB connectivity kit and your laptop becomes the remote control and display as well as providing additional graphing and data manipulation functions.
I've had three Shooting Chrony models and their numerous sensor errors were a constant source of frustration. WHEN they picked up the bullet with both sensors they were accurate however. That goes to show that the easy part of making a chronograph is making an accurate crystal clock. The hard part is making reliable sensors.
The Pro Chrono Digital has them despite the low price. The SC's do not IME.