Users of the Really Simple SSL plugin appreciate its ease of installation and intuitive user interface, making the transition from HTTP to HTTPS simple even for beginners. The automatic detection and configuration feature, along with the mixed content fixer, save users significant time and effort. The plugin is praised for its reliability and performance, consistently providing secure connections without downtime. Many users also find the support team helpful and the documentation comprehensive. However, some feedback suggests that the plugin has become bloated with unnecessary features, leading to slower loading times and confusion due to excessive warnings and settings. For some, this detracts from its original simplicity.