Pros:
- Decent build quality
- Adapter fits well on GoPro HERO 4K
- Supports a 2" strap width
- 360° rotation for flexibility

Cons:
- Harder to check the camera's LCD
- Only works with the “foot” bent back as shown in photo
- May not work well with a 1" strap
- Camera slides down due to camera weight
- Plastic phone clamp of average quality
- Long-term strength of plastic mount untested

The K&F Concept Backpack Shoulder Strap Mount for GoPro Hero 13 12 11 10 9 8 DJI OSMO Action 5, with 360° Rotational, Adjustable Pad has a decent build quality. The adapter fits well on my GoPro HERO 4K, but it only works well with the “foot” of the mount bent to the back of the camera as shown in the picture. In this position, it is harder to check the camera’s LCD. There are also 3 screws on the back of the “foot” to attach it to the “leg” of the mount. The “foot” also fits well in my OEM GoPro Shoe even though it does not have the rubber lock that the OEM “foot” has. A photo is attached to compare the OEM foot (left) with the K&F "foot" under review (right).

The Velcro wrap is fairly strong and can support the GoPro adapter well. However, it is a little stiff and works best with a 2” strap width. It may not work very well with a 1” strap. There is a plastic surface inside the Velcro wrap to grip onto the shoulder strap to prevent it from sliding down. However, due to the weight of the camera, it will slide down for sure. There is no pin or strap provided to prevent the camera from sliding down. Therefore, the Velcro wrap is best installed above a buckle on the shoulder strap, which will stop the camera from sliding down.

The “shoe” on the Velcro wrap can rotate 360 degrees by squeezing 2 release buttons together. It works well, and this rotation can compensate for non-vertical shoulder straps.

The plastic phone clamp can only extend for 1 inch and is of average quality.

All in all, this is a decent backpack strap mount for GoPro cameras. However, the long-term strength and reliability of the predominantly plastic mount have not been tested.