With the GOP Case has now the most important thing in one place and it can also be a holiday without worries pack in the trunk, because it protects the camera from bumps and the like.
The interior is pre-punched for the individual components, but the cut-outs are all listed. So you can accommodate only the things that one has, and allow the remaining "holes".
The 3D case unfortunately does not fit with this version in the case. But I have a very bulky bracket which you can attach to a helmet: Helmet Mount extension arm + Curved Adhesive Mount Sticky Curved adhesive mount + screw for GoPro Hero 1/2/3 OS34 which now fits nicely into the zipped compartment and must not longer stored in a plastic bag.
Takeaway It is not particularly helpful, since it only has a handle. This then looks something like a kindergarten bag, or a "first aid kit". But who wants to take all the accessories. Usually one looks for ever anyway that out, what you need on the day.
However, there are prettier versions: Custom-made accessory cases for all GoPro cameras (Hero 1, 2, 3, 3+, 4) and accessories. PLUS: Car Charger (! Hereof select the aluminum case variant) It lacks but unfortunately this mesh pocket (for it is even cheaper), so that the GOP Case is better thought out from the square and can be individually decorated.