You won't be disappointed. A few years ago, I purchased the Caldwell based on price. The unit did not work correctly with the Android application. My phone did not record each shot. I had to get up, walk to unit and read the speed after each shot. Also, the speed readings seemed unreliable. I bought the Labradar last year.
It took me some research and a call to the manufacturer to learn how to setup the unit and my .22-250 rifle muzzle The unit had issues picking up the .22 caliber bullets. Customer service was wonderful. Due to my bench configuration, I built a bracket to mount the unit past the edge of the bench. Otherwise, I had to sit way back on the bench in an uncomfortable position. I am still learning the Labradar.
From what I understand, Labradar requires/recommends a triggering device to detect the arrow release.