I have two that I currently use. Both Nikons – 550 & the Rifleman 1000. Before buying either of them, (at cabelas) we energized them and went outside with a few different brands. The 550 does a great job at 350 and less yrds, and picked up the target much better that the other brands I compared it to.
On the other hand, the first 1000 failed to get target reflection at over 600 yrds and we tried a few of them. It was the third or forth one we tried by far was much more superior to all the other brands we tested it against.
That is my largest gripe with Nikon. The inconsistency of quality with a product line stinks. But when you find a good one, they work great.
I don’t know if your looking for bow or rifle applications, but these are the two I use. My most common use is predator hunting and have good reflections in a reasonable amount of light. My 550 picks up a coyote good out to almost 400yrds and my 1000 is good to about 700. After that, all the other factors kick in that can interfere with a good reading.