Instruct: Classify a given review into positive or negative sentiment.
Query: Rebel XT Opteka Battery Grip

The quality of this product is very high and it perfectly matched the Canon EOS Rebel XT. The action of the shutter button feels looser than the button on the camera, but it's easy to get used to. The Av button, AE button, and AF point buttons all work flawlessly. I would highly recommend getting this over the more expensive Canon batter grip.