Impressive Andrew stood under the scrutiny of 149 judges during his halter career. Out of those 149 judges, 133 placed him first. The stallion never placed below second. His dominance in halter came from his halter-influenced breeding. Impressive Andrew resulted from crossing American Quarter Horse halter legend Impressive and ApHC bronze-medallion-winning halter mare Roman Annie. Roman Annie was bred four times -- exclusively to Impressive -- producing Impressive Andrew in 1984, followed by the stallion Andrew Impressive in 1988, and mares Impressive Anna in 1989 and I'm Impressive Annie in 1990.
While Impressive Andrew only showed at halter, his get have proven themselves in a myriad of events, many with non-pros or youth riding or at the lead. Impressive Andrew produced more than 340 registered foals who've at the time of his death had earned - 115 bronze medallions, 16 silver medallions, one gold medallion and one superior achievement certificate. Fifty-three of those foals have earned more than 2,100 performance points. One hundred fifty-five of those foals have excelled in halter and earned a collective 6,160 points and 19 halter superior event titles. Ninety-six have collected a total 153 registers of merit.