Disabled this after a couple of weeks. Drove me mad that when you searched you got a load of adverts first, even for things which are not tradeable! And were results from the USA even though I had set my territory as UK. I only downloaded as my broadband providers BT now use them as your "free" internet security. Avoid!
Tip for consumers: Ads will drive you mad when you search for anything. Use Google.
Products used: Norton Safe Search free service from my internet provider, BT