I bought this stabilizer in early 2014 to stabilize the films taken with my go pro hero 3 black edition. Receiving the product as agreed, deadlines are met and the packaging protects the product well. In unpacking the product complies with the order, the device looks solid and well made, it comes with a very simple manual see succinct. For more information I suggest to consult the manufacturer's website (3 or 4 video demonstrations on youtube). In use, the implementation is actually very easy: it sets the GoPro and go. For cons the mastery of the use demand a little practice (that's why I waited a bit to make the comment) but it happens quite quickly (although I still not master all the subtleties). The final rendering is really great, stabilization works really well, it gives much more satisfactory decision-views, I'm really happy with my purchase. By cons, it take a little more space than the only gopro is bulkier, so it has very specific intended uses (not for sport but for filming with the others.) I recommend this stabilizer.