I just purchased the Meike grip for my D7000 and have already opened a RMA to the reseller. The Grip's shutter release button does not work consistently. There is consistently a delay of almost a second between pressing the shutter release and it actually taking a photo. Hoping I just have a bum unit. If they charge me shipping to exchange a bad unit, I'm just going to return it for the Nikon, but if they exchange it for free, I'll give it another shot.