so to be eco-friendly you have to buy a NEW charger for $30. Lets see how eco-friendly this is shall we...
Extra plastic, extra copper, extra paper (cardboard from packageing). NOw, moving on to less tangible costs, transport of product, gas, truck (count truck manufacturing in there), cost of person to do job, emissions. Now, on to manufacture and design of part, Part run through a manufacturing line which uses power, water, and POISONOUS fluids and lubricants, cost of personnel to produce part, design of part on computer electricity use, cost of designer, ect, ect, ect
So to eliminate "vampire" electrical draw, puts lots and lots of bad stuff into the atmosphere. The production of this part is probably 1000% worse for the environment, then just using the charger that came with the phone itself, now if you need an additional charger for work then go for it, but to replace your current charger, this is a scam that steals your money.
Don't forget, you spend $30 on it, how long will it take you to save the $30 in "vampire" electricity? 30 years??? probably....
I am all for saving the environment and stuff, but this actually hurts the environment (when used to replace not supplant your apple charger).