I bought it a week ago to replace a helmet cycling strength to turn his head ended up falling. For maintenance, the helmet fits perfectly in place. Take the snap to set up, there is a small sketch on the box that indicates the procedure. Comfort is nickel, it is forgotten (I use it only in increments of 1/2 hour). No problem below a Bonnet. I just added the tweezers my old helmet on the cable to hang the cable end to my neck which allows me to remove a headset when I have to communicate with the baker for example, without the listener becomes difficult to find when it comes to put it back.
The build quality seems very good. The plastic material is very good.
To confirm that they hold over time and if they prove faulty I would change my review. My use a headset often hangs suspended from its thread (see tweezers above), and it is this listener that loose of my previous race helmets.
I was positively surprised by the sound quality, on some pieces really low relief, but it is more the remark at a standstill.
For 10E I would buy but they will have to take a year :)
For now they are higher than what I expected in the commander.
