This component is simple to install and use. I have been unfortunate with BOTS scanning my site and sending tons of spam via my contact email. I installed "Security Images" however, this application was difficult to shim in and the captcha pieces really weren't that easy to work with or read. I had people failing the captcha but thinking email was sent.
Captcha option for aiContactSafe is simple and easy to use and read. I don't typically write reviews, but this component was worth spending a little time on a review.
I highly recommend this application!