By slowing down a resistance workout the body gets to work the muscles in both an concentric (i.e. flexing) and eccentric (i.e. stretching) fashion. This creates a disproportionate load for each movement which frequently leads to some very interesting adaptations regarding strength and hypertrophy. Arbiter is a workout that uses of all this to help you become stronger and fitter a little faster.
Extra Credit: Use 10lb+ (5kg+) dumbbells minimum.