Two is better than one
GoPro videos are great but they're even better in 3D. With 2 GoPro and a special casing called the Dual Hero System, you can do that. GoPro's latest offering is now compatible with the Hero3+ Black Edition.
Even considering the cost of 2 top-of-the-line GoPros and the casing, it's still one of the cheapest way to make high quality 3D videos. To make 3D videos is not just about sticking two cameras together.
As in the case of GoPro, they need to positioned in a certain way (one upside down and the other right side up), synced via cable, and get the synchronised footage converted to 3D using GoPro's free editing software. The Dual Hero System also allows you take photos and normal videos at the same time.
3D is overated and this product is outdated.