Zabbix helps me to keep an eye on what's happening on my devices. Thanks to Graph and Dashboards I have always "the situation under control". Updates are frequent (I am using the 6.X version). Among the monitoring programs I used I think it's the best, above all, stable and customizable.

I am currently using the 6.X version (i previously used the 4.X and the 5.X ones). And I must say Zabbix is a very good product for keeping monitored your equipment, you should try it. You can monitor software and hardware metrics via agent, snmp or ipmi. You can download a lot of templates to expand the range of items that can give you data or create by yourself (and so you can have triggers to alert you when values are not what they should be). You can create your own dashboards and choose what to display. Remember to allow traffic for TCP ports 10050-10051 as they used by Zabbix Agent, UDP ports 161-162 for SNMP and 623 for IPMI. The file agent.conf (on windows or linux machines) should be configured to match the Zabbix server IP address and in case of active agent, the exact name on the host. Zabbix can collect data of any kind, from a server you can have of course disks space values, but also you can be alerted if a windows event took place, in this case you have to use the zabbix agent active and create items and triggers. There is a lot of documentation on internet, so in case of need you will easily find your answers.

Zabbix is the perfect solution for our organization to deliver proactive monitoring. It gives insights in our business processes and services.

With Zabbix, currently I'm monitoring physical and virtual server performance and usage [CPU, Memory, Storage, etc]. I have realized that Zabbix made my life easier since it sends me alerts as e-mails if any issue occurred in my servers. Specially it helps me to manage my server storage since it sends alerts after severs reach the threshold limits, so I am able to take necessary precautions to maintain my servers.

Zabbix solved the monitoring problem for all our platforms at little cost. Troubleshooting is relatively easy once the devices are set up. Zabbix needs less monitoring for it to accomplish its tasks. Alerting and integration is excellent.