Have an ATN X-S 4K Pro, bought it at $750 several years ago.
Not sure about the negative reviews, as there weren't any when I bought mine.
In short, I love it.
Haven't used it in a year because so busy with work.
Pros:
- It works extremely well.
- Hundreds of rounds using AR15s in 6.8 SPC, 223 Wylde, and AR10/7mm-08.
- LOVE the multiple zero store ability so I can move it between my rifles.
- The Obsidian WiFi app worked well when I tried it, but I don't like having the WiFi on.
- With my own IR torch, can easily see 300 yards in pitch black.
- Battery is good for ~6 hours continuous use.
- Love that you can forget and have NV on during the day w/o damaging the image sensor.
CONS (more like small irritations)
- The brightness of the image hurts my eye after~2 hours (blue light). I have a Vizio TV that's much worse.
- If you forgettherubber eye cup, its like shining a flashlight in your face. I.e you're easy to spot.
- On rare occasion the image is grainy.
- To me, the button menu is clunky. More than once I've reached up to adjust something while keeping sight on target and blanked my screen.
- The IR torch that comes with it is junk. Simple enuf to get a mo' betta one.
That's all I can think of now, HTH.