Once you pay for it, after the sticker shock wears off, you will be very glad you bought it. I just wish someone would figure out a way to be able to use it to trim strait walled cases. I have a bunch of 30 carbine that is over length and needs trimming. Using the old hand trimmer sucks the big one and I find that I just set the over length cases aside.
I actually using mine right now doing 223. All my cases come in at .002 + or - of target trim length, with mixed range brass and mixed number of firings. Most are spot on or within .001 but I find every now and then that goes .002. Definatley more accurate then I need, but that's a good thing!