When I set out to build my dream campervan, I knew I wanted some kind of camera system to serve as as both a "dash cam", as well as give me the ability to see what's going on outside the van at night when I've got all the window covers up. After a lot of research, I settled on this Erapta system. I 100% made the right call.The system is extremely simple to setup. I have it wired so that I can have it running 24/7 as a "CCTV" system..good for general security and in case something happens to the van, I have video footage. I installed the 4 cameras up on the roof rack and wired them down to the screen which I have with the rest of my campervan controls. Wiring the device into my electrical system was very easy. To extend the amount of footage I could buffer, I purchased a separate 256gb micro-SD cart, and the head module of this unit has no problems using it.As for the cameras, they work great. No sealing issues, no issues with EMI. When they get dirty they can be a little hard to see in night-vision mode, but a quick cleaning restores the image quality. I can't really ding Erapta for that, since even the most expensive camera would have issues if dirt is on the lens.The head module is great. It's simple and trustworthy..it just works how I expect it to. It has nice features to arrange the camera views, dial in camera settings, and change how it handles recording. Like I said..it just works. A minor nitpick I have is I wish the SD card slot was accessible from the front. Since I recess-mounted the module in my control panel, it would be a pain to get the SD card out - However, this was my choice and I doubt many customers are doing what I did. Most people would surface-mount the head module.I highly recommend this camera system for all RVs and Campervans. It's an essential addition to our van security and really great when you're camping and hear a weird noise outside. I just turn on the screen and check it out, without having to open my window covers or use a flashlight (exposing the fact that we're camping). It's especially helpful when we are trying to be "stealth", camping in parking lots that say no overnight camping. Lastly, Erapta's customer service was extremely helpful I had with some questions during the install. They are very responsive and understood my nuanced technical questions immediately.