I've been looking for a headband and action mount adapter for a smartphone for a long time. I finally got it today and can't wait to try it out on my kayaking and biking days. Also, I had this paired with my recent purchase of an Imvio case with a lens (wide and fisheye) so I can record GoPro video on my iPhone without spending $200. your head is tense. Be careful not to overtighten it or you'll get a headache. The strap feels grippy on the inside, but I don't know if it stays on while I sweat. Another thing I was worried about was not being able to open my phone while it was on the mount. If you position your phone correctly, you should be able to open the camera app without any problems. I have an iPhone 6 so it's big enough to open the camera app without the mount getting in the way when swiping the app. The only issue I see is the strap holding the phone. It's so small I can't imagine it being any bigger than the iPhone 6. The more you risk the strap holding the phone securely away from the suction cups. All in all, this is a great accessory for anyone who wants to record videos with their phone. Smartphone hands free. But I will come back and give another review after a few uses.