I like mine a lot. I don't shoot calibers smaller than .22 much or cartridges that have velocities over 3900 fps, so those limitations are not an issue for me.
The big thing is that I shoot at a range where there are usually other shooters, so setting up sky screens is a bit of a hassle. That's eliminated with a Labradar.
I find that I need to be careful to aim the unit precisely at the target in order to get consistent readings. I added a little plastic sight I got on Amazon to top of the unit to make that easier.
Otherwise I find the Labradar easy to use and quite consistent in its readings. And it's not affected by lighting variability.
For me the unit works great.
