This plugin appears to be well coded and laid out. It works well and the bit of support that I needed from the visualCaptcha team was caring, responsive, efficient, effective and simply, top notch. They helped in making visualCaptcha work with another custom plugin that I use for my forms. visualCaptcha is very user-friendly and professionally presented. My experience to date makes me believe that the people behind visualCaptcha are fully committed to long-term support of their plugin. I highly recommend.