There's a lot of negative comments here, so let me add my positive experience. I love my GoPro. I started with a "Hero3+" and have upgraded twice. I now have a

There's a lot of negative comments here, so let me add my positive experience. I love my GoPro. I started with a "Hero3+" and have upgraded twice. I now have a Hero7 that I use a few times a week. I took five different GoPros on a rafting trip down the grand canyon and came out with some great footage. The advantage of GoPros from the beginning is that they're a small durable camera that takes good footage. With the image stabilization that they have now, you can get smooth footage even when you're mountain biking down a rough trail. The downsides are: they take a while to get used to using (although the newer ones have a much better interface), and you have to spend time editing the videos before sharing them. Also, it turns out a lot of what we do is pretty boring. As to why no other camera manufacturer has taken the market from GoPro, it turns out it's hard to build a compact camera that's durable and produces good footage. The $150 knockoffs just don't have the same quality or durability. I still see a bunch of them on the slopes though (particularly on kids, which makes sense). Still, it's a limited market, and phones have gotten better (and waterproof), so people don't feel like they need a dedicated camera, so it's going to suffer the same that most of the camera industry does.