Haven’t used Har-Bal. I do own AAMS and what it does is almost magic. It simplifies the mastering process to an almost child-like level (in auto). The reference files are ok...I'm having success with the rock reference. The ability to create your own reference files from your favorite CD is very cool. I'm sure in the future I will learn to master manually. For now, I'm saving cash and have a finished, polished product that actually sounds good.