This is Fusebuster's TrustRating, which is based on both the number of reviews Fusebuster 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 Fusebuster has been to the Kudzu community.
Their prices are right on and they do stand behind their work. I have had 2 air units and one heating unit installed over the last couple of years. Some minor problems but they always corect the issues.