Used my new Labradar yesterday for the second time and liked it even more than the first. Fired 80 rounds from 4 rifles using 4 different targets and didn't miss a shot (100 yds). Did not have to reposition the unit at all. Setup took about 3 minutes. No trouble aiming, that looks to be a newbee issue. I wouldn't waste my time with any Rube Goldberg aiming devices. I am using a portable power pack that cost 17$ and have the settings on max so that the unit stays armed and the screen stays on as long as the settings allow. No power issues. The power pack was charged when purchased in December and still has plenty of juice left. Don't waste your time with AAs.
The M2 was a special occasion device for me due to setup time/hassle and I seemed to get different readings on different days (lighting differences no doubt). The LR is an every trip device. The only hassle for me now is is the extra box that needs to be carried to the bench.
Yea, I drank the koolaid and am hooked.