I have often wondered, do more expensive laundry detergents work better than the cheaper ones. Some people, my mother included, will only use Tide for her laundry. My MIL usually sticks with Purex. I switch up often and usually get what's on sale or what I have coupons for. What do you think, do you have one detergent that's better than all others, or do they even differ enough to matter?