Users appreciate the simplicity and ease of integration of this WordPress plugin, especially its seamless connection with Google's reCAPTCHA, making it quick to set up and effective in preventing spam. The fact that it's free is also highly valued. However, significant drawbacks include frequent malfunctions, poor support, and incompatibility with Contact Form 7, leading to error messages, reduced site performance, and display issues across different browsers. Users also lament the infrequent updates and lack of thorough instructions, making it sometimes difficult to implement without running into errors. Despite these issues, some users still praise its basic functionality and simplicity when it works correctly.