I have a meike for my 60D and it seemed ok, except for the reviews saying it shorted out batteries, I checked the internal wiring and it was all fin on mine. However sometimes the thumb wheel on the back of my 60d would stop working with it attached, untill I turned the exposure wheel. No biggee. But shooting a friends wedding, I was against a wall in a kinda cramped area, and was holding the camera a little weird, and gripping the meike grip firlmly, and it all of a sudden, powered my camera down and the batt light was all that was on the top LCD, and it wouldnt tunr on/back off. In about 30 second I had the grip removed and the batt and door back on body only, and I didnt miss a critical shot, but it pissed me off. It did the same thing with my 300mm lens a couple times. I assume the cheap plastic flexes too much when gripping tightly, and loses contact