Not a whole lot of information being talked about on the impact 4k from what I can find. I purchased one a few weeks ago and it's been working great. Got drawn for mule deer in Montana this fall so I'm excited to get it out there an see how it performs. I like the feature of connecting it to my phone using the Geo balistics there's a map there so you can range an object & it marks it on the map however that part is not accurate, depending on certain direction of fire I've noticed it can be anywhere from 100-600 yards to the left/right of what I was actually ranging. Has this been the case for those of you who also have one???