One benefit of measured detergent is that the wash cycle can dispense the correct amount for different parts of the cycle, for example the pre-wash can dispense a small amount and the main cycle can dispense a larger amount. The rinse at the end can dispense rinse aid.

This system offers more control to the machine about when fluids are used, though it would be much better to include refillable tanks instead of the cassette system.

I own a Bob and use powder since mine has stopped pumping detergent...