I have used liquid detergent and powder detergent from other brands and swapped to this one due to the better value of price per load. I have been happy with the tabs as my dishes come out clean without a weird white residue like the powder detergent did.
The tabs are great as they contain all the cleaner you need instead of having to squirt or pour detergent into the cup and either get too much or too little product, causing waste. Since you only need one tab per load, I know that I can get 90 loads of dishes from this one box! One load of dishes a day would mean that I get about three months of clean dishes from this one box!