These are 3 of the 6 dryer balls we purchased at the Vermont Country Store last month. I wanted to find a way to save on Dryer Sheets AND save on electricity when using the dryer. I do hang all of my work clothes/under things to dry, but DH's work clothes and towels I run through the dryer.
As per their website:
Well, so far so good. I am using the lowest heat setting, and I am saving about 15-20 minutes in dryer time as well. I think that this was a good purchase.