Working out great! Una vez que sabes como colocarlos son muy seguros y aunque muevas demasiado la cabeza no se van a caer. As for noise cancelling I dont think it works at all and the battery charge lasts about six hours not the eight stated. For the top two holes use a 1/2 drill and drill from the back, for the bottom holes use a 1/8 drill for the pilot hole. Muy buena la calidad del sonido se escucha muy bien y son perfectos I am 5ft 11in medium to stocky build. It there was a way to add a smart timer to it now that its hardwired in, Id like that. I have a small 4 door, Mazda 3. Only had it - the new version with the 12 ft cable - for 2 days, but so far so good. After this, the front wheel was just barely off the ground, and the bike more stable.