Eco friendly dishwasher tablets

I have used almost all my old Cascade dishwasher tablets and am ready to try something new. We went to the Whole Foods Market today and I bought some Ecover dishwasher tablets.

Cascade: $4.29 for 20 tablets is 21 cents per load

Ecover: $6.39 for 25 tablets is 25 cents per load

If these work as good as the Cascade tablets than I think 4 cent per load is a small premium to go eco friendly and absolutely worth it. They also have eco friendly rinse aid which I will buy next time.