Are background checks sites such as Intelius useful?

I have one very minor concern regarding the criminal background check.
Back in freshman year, I drank two beers on Cinco de Mayo and drove 3 hrs later. I was pulled over and a cop made me do a breathalizer test. I blew like a .021 or something like that, but the cop still wrote me up because it was technically driving under the influence (@#$%& pigs haha).

But because the number was so low and I treated the cop with respect, he said that he will just write me a ticket comparable to a speeding ticket. He also told me that this would not be on my record. I ran a background check on myself using intelius, and like I assumed, there were no criminal penalties on my record.

Do companies run background checks using programs such as Intelius? Are the results that I got from my own background check identical to what a company will see? Also, just to be super safe, is there a place that I could contact to get an official background check or criminal history report?