I received these in the mail the other day after seeing multiple ads pop up all over the place. If it weren't for IG ad placement and multiple grabs of my attention, I would have never purchased. At first, I chucked at the product and what I bought, but I installed using the easy installation guide. Easy Peasy! I took the bikes out yesterday and mounted my DJI Action 4 to my face, and the game-changing footage I was able to get was exactly what I was imagining. They offer when purchasing multiple other packages...BUY THEM! You may not need them all at once, but I can assure you as you ride you'll find use cases where you want different options, and having them on hand was so much of a relief! I used a blow dryer on the 3M adhesive and did exactly what was in the instructions. I have 100% faith that these mounts will withstand any movement and abuse I put them through. I'm now ordering my wife's helmet mount and two sons so that they can log their seat time as well.