I bought a 4.0 prior to the 5.0 coming out several months later. I wasn't satisfied with, particularly, the zoom level. I was able to send it back, then bought a 5.0 from the same vendor later. I like it's zoom. I didn't want the gun mount because, if I want some video, I want more than just the shot and can't see moving and waving my gun around to get pre-shot footage. I made my own cap mount which, I think, is superior to that made by Tactacam. I would agree with others that the video quality is not as good as professional cameras but, for me, it's sufficient.