I recently tested MODX, a powerful open-source CMS that shines in flexibility and speed. Here is my detailed review based on practical usage and research: MODX impressed me right away with its lightweight core and no-bloat design. I built a complex site with custom templates, and it loaded blazing fast, easily passing Core Web Vitals thanks to built-in caching. Unlike rigid platforms, MODX lets you use any markup or JS framework for true creative control. The security stands out; it's architected with robust protections and a proven track record as the most secure open-source CMS. MODX Cloud adds managed hosting with auto-backups, SSL, and Backstage staging for safe previews. Community support is amazing, with free forums and paid options. For developers and agencies, granular permissions and pixel-perfect precision make it ideal for scalable sites. The learning curve exists for its unique terms, but once mastered, it's efficient. Minor con: manager UI feels dated, not fully mobile-optimized. Still, for performance-focused projects, MODX delivers unmatched freedom and reliability.