I have used Open DNS for some time now. I have never had a negative experience with using it. This free service is an excellent added layer of computer protection. I would recommend it to everyone.
OpenDNS is the leading provider of free security and infrastructure services that make the Internet safer through integrated Web content filtering, anti-phishing and DNS. OpenDNS services enable consumers and network administrators to secure their networks from online threats, reduce costs and enforce Internet-use policies.
We secure every device, everywhere to reduce the risk and impact of security breaches. Big data analytics predict and prevent threats before they happen.