Users appreciate the EWWW Image Optimizer plugin for its ability to significantly improve website speed by optimizing images, reducing load times, and saving storage space. It is praised for being easy to use with simple configuration, offering many options for image optimization and resizing, and efficiently compressing images. Users also value that it preserves the original image integrity. The plugin shows excellent integration with cloud storage services and is deemed reliable and continually updated. However, some users are annoyed by persistent prompts for reviews, malware alerts (which were later clarified as false positives), and insufficiently communicated default settings that affect image conversion. One user mentioned a frustration with UI and documentation gaps related to default behaviors.