This is supposedly a revamped Meg's APC , which I've heard good things about. Some have even compared that product to Optimum Power Clean, and for half the cost per gallon no less! Nevertheless, I was disappointed with D107 as it simply could not keep up with the cleaning power of OPC. Tested both undiluted on tires/wheels that had never been cleaned before and there was no comparison... OPC kept going, justifying the increased cost. My jug of D107 will be relegated to less demanding jobs, although it's still a decent value over those cheap, caustic APCs that you'll commonly find elsewhere.