I love taking the GoPro on trips, and especially sailing, but it didn't come with any kind of bag and I wasn't sure what to use. And then it hit me: a Side Effect! Works PERFECTLY. I put the smaller bits (extra battery, etc) in the front pocket, and then put all the case backings and mounts in the main compartment. I love these little Side Effects, there is always some new way to use them.
In the first photo, there's Where's Waldo in the form of my 11-year-old son, hiding in the background. He's blurry, but visible if you know what you're looking for. :)