AIOSEO is praised for its ease of use, comprehensive features, and effectiveness in improving website SEO. Users appreciate its ability to simplify keyword addition and sitemap setup, leading to increased web traffic. Many find it indispensable for web development, valuing the manual and automatic SEO adjustments it allows. However, some users report issues with functionality, particularly with compatibility and updates, stating the plugin doesn't work or hasn't been updated. Overall, while there are positive remarks about its performance and impact on rankings, there are complaints regarding recent utility and support.