The product works as advertised in that it does provide some fairly effective protection for our critical assets (data).
It offers multiple levels/scopes which can be adjusted depending upon how much you want "the beast" running around all over everything at once or just keeping an eye out for low level threats such as phishing attacks etc.. I also appreciate being able to create my own rules using their API - this helps make sure we are not missing anything important but could result if too many things come up with very specific conditions! Sometimes there will appear new vulnerabilities via security bulletins from other vendors so i'm always monitoring these closely; however since stealthdefend watches only 1 vendor then its less likely any changes would impact us negatively unless they release something really big like Heartbleed!