I use mine all the time.
1, that why I purchased it.
2, you can learn so much from the data especially 22lr. Have a flyer, look at your speed. Chances are you will see a difference in velocity. That you can't control, you chasing it. That is something you can now control.
3, center fire, get so many rds on a cleaning. You see velocity change, you can clean and see a difference. Again another data point to keep you from chasing your tail.
Can only speak for myself, the more data you have the better decisions we can make. Actually have 2, the both get used all the time. The money is spent, my plan is to get my money's worth out of these units. If one shit the bed, I would replace it today. They are that valuable to me.