I got this unit for free to do an impartial review.The HD Endoscope is pretty nice unit, it's simple to use and has a pretty good camera.Construction is above average but could be better at this price point. I like the all in one nature of this unit as my old one required a WiFi hookup to my phone.The Good:1) The cable and camera are really Nice. This is my third Borescope and the cable on this one is by far the best one in terms of getting the stiffness and durability just right.2) The Screen has a pretty good resolution, I would not call it super HD but it is good enough.3) The controls are nicely laid out and the ergonomics are good but somethings functions like getting a video recording to start takes a little time to figure out.4) The unit feels like it could take a table top drop onto a tile floor without a problem.The Not So Good:1) The lens on the unit has a very narrow focal length. It works great with wide areas but anything to close causes a blurry picture. You can see the rifling in a 9mm pistol but it's not very clear. It is much clearer when I use it on at least 2" wide pipe. The same problem with the side camera, you got to be at least two inches away to get proper focus. This really comes into play if your searching for hair line cracks.2) Even though it has a great digital zoom on the screen the zooming is not recorded on the final file when making a video. They need a firmware update to fix this.3) Frame rate is low at times.4) Battery life seems to be about 90 minutes with constant use.5) Contrast in the image just looks too harsh. It's either to bright or to Dark. Changing light intensity does not fix the issue.