Occasionally NEMS gets mentioned in publications or podcasts. Here's my list of the times I've caught it. If you know of others, please let me know in the Community Forum.
The host explains part of the appeal of NEMS verses a do-it-yourself approach to deploying Nagios on a Raspberry Pi: "You go to a browser and you go to the IP of the device. It's got a beautiful interface on top of it, which I think is specific to NEMS." - and that it is. He goes on, after explaining how he bought a Pi 2 specifically to run Nagios but found the setup to be daunting, "This is what I've been looking for for nearly a year: Just an out of the box solution for putting Nagios on your Raspberry Pi ... BOOM, done."
Under the terms of the CC-BY-SA license under which they release their show, I've archived the sound bite and you can listen here.
In the episode, the hosts discuss not only the basics of what Nagios is (and even how to pronounce it) but how to obtain and deploy the legacy 1.1 release of NEMS Linux, getting a "ready to use" Nagios deployment on a Raspberry Pi 3.
"Because an enterprise monitoring service is going to help you and your IT department to figure out what assets are having trouble; what assets are running great. To have a dashboard—an overview—to be able to see what's going on on your network... I use the 'hard drive space is low' on the server for example, or maybe the backup drive is almost out of space... you need to know these things, but you may not go around to every computer and figure it out. So using something like Nagios, you're going to be able to monitor these things."