Tabs dispense the max does of detergent - whether its required or not. That's only good for the detergent manufacturers who get to maximize their profits overselling everyone on detergent. It's horrible for the environment - manufacturing, distribution and more importantly - wasted detergent that gets flushed down the sewer and drives up the complexity of treating wastewater.

Tabs absolutely suck! Is it really that freaking difficult to dump a little powder in a cup? My dad is 87 - the first six years of his life if they wanted water they hauled it from a well, if they wanted hot water they heated it on a stove - after chopping firewood. If they wanted light they lit a kerosene lamp. Fast forward and people are overdosing dishwashers because it's a few seconds faster to throw a tab in. While screeching about global warming. The irony.