I like how easy it is to use for newbies, as well as seasoned users. It’s fast (and free!) and doesn’t require any configuration other than installation. You can monitor your servers 24/7 by simply running a couple of commands in terminal every few minutes if you want. The only downside that comes up from time-to-time is when one or more nodes goes down. This usually happens due to network outages or node failures but does not happen often enough for me to dislike this program. Highly recommended! We are using it at work to keep track of our services and to make sure they remain online all day long.