The BOA system is my 2nd favorite innovation besides Magnetraction. So easy to use, I have made adjustments while I am strapped in and barreling down the hill. These boots also have an air liner so you can fine tune the fit once your feet have warmed up and settled in. The toe gel and comfortable tongue help with impact and add to the all day comfort. Last, the Judges has about a mid flex so they are excellent for the whole mountain.