Pros: Relatively Inexpensive, Has flexible tabs that hold one side of GoPro, allows access to memory card, connection and buttons
Cons: Not solid holder- Lens side of GoPro not held tight so can actually move as much as 1/8 away from mount. This makes it unsuitable for moving camera shots or anything that might have vibrations. The bottom cameras will swing out this much out of alignment. You can tape them in but that tends to defeat some of the reason to have a mount.
Also uses GoPro mount and doesn't provide a screw mount This mean's less rigid and requires GoPro tripod mount and at least another goPro bracket to attach to a tripod or monopod. The GoPro mount also means you have long GoPro screws visible on camera unless you replace them with standard hardware store screw.