Here's what other sites are saying:
The Salomon SNS X-ADV Access is a convenient and comfortable backcountry binding, that now provides more stability and control thanks to reinforced, wide axes and steering edges. Step-in convenience. To exit, forward binding part can be held down with a ski pole, or hand Compatible with SNS-ADV or SNS-BC boots The binding has had several names over the many years of production- SNS-BC Auto, SNS-BC Access, XADV Auto. But the binding has never really changed, because it worked well from the first day it was available
You've got a lot of ground to cover, so step in and get a move on with the Salomon SNS XA Auto Backcountry Binding. It has a wider platform to fit the girthier backcountry ski and an automatic step-in system, because there's a vast world of freshies out there, and first tracks only happen once.