After using the Speck Presidio Grip 2 for a half day, I have a few thoughts:
1) Grip is good and it's a very protective case.
2) Fit is perfect, fits flawlessly with screen protector installed.
3) Camera Control cutout is shaped well and leaves the button easy to use.
4) Related to #3, I think I actually like the cutout as opposed to a protruding button on the case. It protects the Camera Control button from being accidentally pushed while still leaving it easy to use, and it also creates a handy little notch for my finger to grab when pulling the phone out of my pocket. I set the Camera Control button to double-click to open, which should keep it from being accidentally triggered when I inevitably touch it.