I WAS TRAVELING AT A LOW RATE OF SPEED(30 MPH), ON DRY PAVEMENT, AND WAS CONFRONTED WITH A LINE OF VEHICLES THAT CAME TO AN ABRUPT STOP. I ENGAGED THE ABS BRAKE SYSTEN ON MY 1993 SUBURBAN ONLY TO CONTINUE FORWARD AND CONTACT THE VEHICLE IN FRONT OF ME. THIS ABS BRAKE SYSTEM, BASED ON MY EXPERIENCE, IS MARGINAL TO POOR AT BEST RELATIVE TO RESPONSE AND PEDEAL FEEL. REGARDS, PAUL J. LEESER