An excellent set of action camera mounts, which includes everything I need.

The head mount fits very well and has rubber inserts on the straps that prevent slipping, for example on a helmet. However, I think it might swing during sudden head movements when using it with my Insta360 X4, as its centre of gravity is higher than that of a GoPro.

The chest harness fits perfectly, the straps are quite firm but elastic, allowing you to move freely.

The wrist mount is not suitable for the Insta360, as although it can be firmly fastened on the wrist, the camera mount wobbles. Due to the high centre of gravity of the Insta360, the camera swings a lot. This mount is more suitable for a GoPro. I liked that the wristband has two velcro fasteners: a small one, which serves to keep the wristband rolled up when you put it on with one hand, and the other, a full velcro, which allows you to fix it firmly on the wrist. Also, by pressing the side buttons on the camera mount, you can rotate it and change the recording angle.

The backpack strap mount is decent, but I don't understand why it wasn't made rotatable like the wrist mount. Luckily, the set includes an angle mount that allows you to rotate the camera, although this means an extra bracket and an extra screw.

I liked that the smartphone mount has a cold shoe mount, allowing you to attach additional equipment, such as video lights or external microphones, along with the phone.

The set also includes a GoPro-type mount adapter to 1/4" thread, allowing me to attach my Insta360 X4.

All the mounts are made of fairly light plastic and seem to be sturdy, although I'm not entirely sure about their durability.

Overall, it's a good set for an action camera owner, and I can recommend it.

I hope my review was helpful to you and helps you make the right choice.
Thank you for your attention!