Open DNS

I'm really intrigued by a service called Open DNS. I'm intrigued because of it's claim to offer content filtering for free. I've installed it on my laptop and so far am pleased with my experience. I'm hearing at least a little controversy surrounding the service due to privacy concerns -- some entity has access to the site's I'm visiting. Not a big one for me because I more-or-less assume that people have access to that data anyway -- after all the internet is about network traffic being routed through a gazillion devices on the internet, many of which are very capable of logging my activity.

Anyway, back to the subject. I'm wondering if it is as high a quality a service as perhaps Safe Eyes, at least on the content filtering front. I resell the Ethershield product, but perhaps OpenDNS is just as effective?

Let me know if you have any experience that helps.