I've had my V1 for about a month and several shooting sessions, I previously had to borrow a conventional chrony so my overall experience is a bit limited.
However I like it a lot - It plain works. Sure you have to change you range practises because of the point of impact thing (its about 1- 2 inches with the rifles I've so far used it with - all lightweight sporters) but once you've gotten sorted - no problem.
Now I shoot my foulers to make sure I have the aim point in the right place, if not I adjust the aiming point (not my scope - remember I'm not a dialler and these are hunting rifles) and fire the strings, typically I'm doing ladder tests or the like.
Once I'm shooting final groups I take the chrony off and if necessary adjust the zero.
Best thing of all - no missed records in the middle of a critical string because the light changes or a sight mis-alignment of the screens.
Foster