It works well, though I tend to steer clear of physical camera buttons for fear of introducing unwanted motion into the capture process. (theverge.com)
With hardware keys you have a volume rocker, power / unlock, and physical camera shutter button running down the right hand side. (knowyourmobile.com)
I'm a fan of physical camera buttons, but the Exhibit II 4G, like its predecessor, is without one; you'll need to use the camera app icon instead. (cnet.com)