Some form of spam protection is necessary; it's a simple plugin installation process and there were plenty of tutorials online to answer any questions. The recCAPTCHA option by Google is more straightforward, though.
What do you dislike?
It's not very user-friendly and annoying, nor is it necessarily ADA compliant. reCAPTCHA is a better version of this.
What business problems are you solving with the product? What benefits have you realized?
* We monitor all KeyCAPTCHA reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. Validated reviews require the user to submit a screenshot of the product containing their user ID, in order to verify a user is an actual user of the product.