Users mostly have a positive view of the Ultimate Blocks plugin, appreciating its ease of use, simplicity, and wide range of customizable blocks. It seamlessly integrates with WordPress without disrupting site functions, unlike other plugins. Users are impressed with its ability to enhance their blog content by adding professional-looking elements like accordions, call-to-action buttons, and table of contents. However, there are some drawbacks. Issues like automatic overwriting of user-specified anchors and broken links when anchors update upon changes in heading text were noted. Additionally, an intrusive yellow icon for the PRO version and some compatibility issues with specific themes were mentioned. Overall, users find it a helpful tool for both beginners and advanced users.