Reviews of the BluApple Fruit and Vegetable Keeper?

Has anyone tried the BluApple? I was grocery shopping today when I saw it in the produce section. I was tempted to buy it, but wanted to hear some reviews first. Also, I was wondering how much the refills cost. The set of two BluApples to start was ~$8, but the refills weren't marked.

Here is some info from a website if you're not familiar with this: http://www.dailygrommet.com/products/376-bluapple-keep-fresh-fruit-and-vegetables-longer-

By Laure Sullivan from North East, MD