The SL's don't have canting. That's the only drawback.
As far as riding goes, I suffered a bone contusion the almost sidelined me for the season last year. My doc said no jumping so I ended up just charging the rest of the mountain which is what led me to buy these. I didn't end up riding them in the park until this year and fell love with them even more. A few clicks of forward lean and they can charge anywhere. Run the highbacks straight up and they're the perfect park binding.
I really wish they had canting though.
Correct me if I'm wrong extremo but isn't the new Union Factory binding for 2014 basically the SL with canting added?