OpenDNS is easy to set up and has excellent content filters for a family home network.
There are two ways to use OpenDNS: you can simply change the addresses of the DNS servers your computer or router use to the ones OpenDNS provides; or you also can create an account with the service and access a wide range of additional features. These extra features make the website more complex than rival services, but it's not too difficult to find the information you need to get it set up.
The Windows instructions cover every version from 98 up to Windows 7, with screen shots to help you every step of the way. There are also instructions for setting up 19 brands of router - again with step-by-step guides and screen shots. Interestingly, the instructions work just as well if you use them to set up the other two services on test.
Once you have changed DNS servers and restarted Windows, your browser will use them instead of your ISP's to deliver web pages. OpenDNS responds to URLs very quickly and was the fastest on test. There wasn't much of a difference between the three services we tested and you won't notice huge differences in web browsing speed, but any speed boost, however small, has to be a good thing.
However, the main benefit of OpenDNS is its extras. There are four levels of content filters to block adult or unsuitable content from children, which is ideal if you've got a home network where children surf the web with minimal supervision. You can also configure a custom level of filtering, where you choose what to allow and block. OpenDNS also offers phishing and malware protection, web statistics, logs (so you can see which sites have been accessed), auto-correction of typing errors when entering web addresses and more.