They're pretty good, especially at the price point (about ?60) and come with loads of mounts that are Go Pro compatible in most cases. They need a lot of light in low light conditions though, so won't compete with a Hero 4 for example. There again they're a fraction of the price. If you get the optional suction mount kit it can be used as a dash cam. Make sure you get a genuine SJCAM one and not a Chinese copy (ironic as the SJ4000 bears a remarkably close resemblance to a Go Pro). LCD screen is very useful for framing. See youtube for loads of reviews and comparisons.