We run http://www.TheTravelingTwosome.com as a WordPress Site. As you can imagine, being the home base website for all of our activities from our TV Show to our book publications, this website has a very high volume of traffic. Unfortunately, it also produced nearly 1,500 spam comments per day. Managing these comments was becoming a full time job. We were looking for "the perfect" comment spam solution and THIS PLUGIN HAS BEEN IT! The user sees no difference in the comment form (no captcha, etc.) and we have (so far) received ZERO spam comments since implementing this plugin! I believe this is because of the logical method Anti-Spam uses in ensuring you are not bombarded with spam comments. A brilliant idea in combating comment spam, this plugin practically guarantees a spam free website!