I have installed this on my 20 ft cube truck that tows a 20 ft trailer. One camera is on the back of the truck, giving me an overview of what's behind me, the other in on the back of my 20 ft trailer.The cameras were plug-and-play, pre-paired so they connect without any configuration. They are also built well and look to be well sealed, so I believe these will last.The kit came with lots of bits, including a power connector / splitter for the cameras when you're testing things out - very handy.I didn't need a range extender for the back camera, which is nearly 40 ft from the display unit.I've had these in use for about 2 months. My truck is a commercial truck, with stiff suspension. So far nothing has broken in all the jostling down the road. Occasionally the back camera will go into a pinkish haze, or it will disconnect - powering off and on the head unit always corrects this.Camera picture quality is great, the low light ability and color is excellent, and night vision is good.It's a realtime feed, there's no issue with lag or delay in the picture when backing up - you can trust that what you see is where your trailer is.The brightness for the camera is great in the daytime - you can see it on a bright day.The bad:That great brightness is overpowering at night. I attempted to use the auto-dim setting, but it doesn't do anything as far as I can tell. What I ended up doing is putting one of those flip-dow sun-visors over it so I can flip it down during the night. It's not as ideal as a a proper auto-dim however. If you drove mostly in the city at night, it probably wouldn't be that bad, but I drive dark country roads.The buttons are very unresponsive. Sometimes they click just fine, other times you have to keep trying to find the angle/spot to make it work. This is a problem when you need to make a quick adjlustment while driving, as it can take too long. The buttons should be real click buttons, not the smooth plastic sheet type. This display unit is for the inside of the cab, so water/dust shouldn't be an issue.Otherwise, I like it, and I'm going to get more for my other vehicles.