Why a Reverse Valve Body?

Personally, I liked the idea of a low band apply RMVB, and bought one, once. First time I used it, I shifted into 1st from 2nd at maybe 15 mph closed throttle, and like about went through the windshield. Never did that again. always made sure I was at a complete stop before shifting 1st gear. I have never had a sprag failure, with a non low band feature, but will state, I don't make the power (even with my big block) that many of you make, and I do drive it properly.