This is randalk's TrustRating, which is based on both the number of reviews randalk has written, and how many other people have voted those reviews as "helpful." It's a way to quickly to determine the value of any single review or reviewer, because it's based on how helpful randalk has been to the Kudzu community.
Took my car in for an oil change. I had a coupon for this service for $19.99. When I went to pick up my car the bill was around $45. They said they had to put in an extra quart of oil than the coupon offered.