I really like the auto-discovery feature.
Checkmk features auto-discovery, effective multi-site monitoring, and valuable capabilities like resource and infra monitoring. Known for versatility, scalability, and ease of use, it surpasses Nagios and OMD. The alerting system is reliable, but new users face initial setup challenges. Persistent alerts in logs, limited script flexibility, and integration issues need addressing. Users seek more comprehensive documentation for better guidance and improved data exporting capabilities.