I just got to test out the laser genetics designator on a friends scope. That thing is awesome. You can adjust the beam from smaller to wider. I have to say I will eventually get one. I was shining it at a house, trees, cars etc. over 600 yards away and had the burris scope turned up and it was friggin awesome. Ya'll have got to check these things out if you need to smoke some vermin at night. I can't speak to the durability, or battery life but the concept is definitely cool and it lights up wherever your scope is aimed. I was very very impressed.