The first time you turn the GoPro in this case we can not help pinball: you have to twist the plastic rather pronounced way before it happens ... I wonder if it will hold over time ... Otherwise the device is held in front and behind, you reach all buttons without difficulty or inadvertent support. Possibility to change the battery without removing the frame. For access to USB ports / HDMI it will make your choice before putting the box: either you leave the top cover and it will not be possible to enter after, you remove the front bezel and then everything remains accessible. As for the microphone: there is no hole in front of the microphone of the GoPro Hero3 ... a bit of a drill and your sound will be even better! So practice, resistance testing, and sealing of the microphone is a fault in my opinion. For the price, a cover to protect the lens would have been welcome ...
