1. It is reasonably comprehensive and covers a wide range of topics related to Springboot.
2. It is organized in a simple manner -- with each topic being explained in a few pages of easy-to-browse information.
3. It is peppered with example codes.
In summary, the content of the material is comprehensive and complete. It covers the introductory to advanced topics in Spring boot development. The sample codes are up-to-date and clear. The content is organized in a number of small topics. It is easy for readers to locate the materials.