The WordPress REST API plugin receives mixed reviews, with users appreciating its innovative capabilities yet facing some critical issues. Users find the API well-written and useful for extending WordPress functionality, making it easier to build decoupled CMS solutions and integrate modern technologies like AngularJS. It simplifies the implementation of Service-Oriented Architecture (SOA) and provides numerous hooks and filters. However, the plugin has significant drawbacks. It lacks clear documentation, posing challenges for beginners and intermediates. Additionally, there are compatibility issues with PHP 7.2, causing deprecated errors related to 'mysql_' extensions. Some users experienced site crashes upon activation, while outdated instances make it difficult to ascertain current utility.