pedal extenders?

Anyone use them? I've seen adds for them out there but have never seen or used them in person. Just wondering what you thought of them and how they felt. Did they change the feel of the pedal? If so was it in a good or a bad way? Any reccomendations on what would be a good brand? My wife bought me my dw 7000 for my b-day, even though I would have liked a pedal with a long base like an axis since my feet are big, I can't be too picky. I'm still practicing heel-toe and can get it going decently with my feet high on the pedal so that my heel is on the pedal, only problem is that it puts my toes up in the chains and beats my feet up some. I'd like to look into getting pedal extensions so I can continue using my current pedals and save my feet.