I just got a new battery grip for my 40D. I usually only buy Canon products and accessories, but I didn’t feel like spending all the extra money. So I held my breath and bought a Zeikos ZE-CBG50 Battery Power Grip for Canon 40D & 50Ds.
And I guess I’m still holding my breath. I haven’t experienced any problems even after the expedition to Peru plus two family Conferences. I like the way it makes the camera look more imposing, and the second shutter release is so much more handy than I anticipated. I also have come to like the super long battery life. At first I didn’t think it would be much different than normal, but now I almost never have to worry about running out of power during the middle of an escapade or photoshoot.
In deciding what battery grip to purchase, I finally went with Zeikos after much research because it had a consistently high rating among many users. It doesn’t have a “squishy” shutter release, it does have the extra zoom and metering buttons, and it seems relatively sturdy for an off-brand product.
I bought it off of Amazon, receiving it in very good time. I recommend this product.