I have Solly Guardians - Heavy, and Marker Tour F12's - Squeaky.
I like the Tour F12's bec they are lighter but neither ski that great. Hard to explain
but the rails somehow make the ski feel weird underfoot during the downhill. I've used reg alpine bindings
on the same ski and the ski reacts TOTALLY different than w/ the rails. To the point where I usually
revert back to Tele for B/C. Solly Guardians have past reputation of Fractured Rails if you push them
too hard. I don't know if that complaint remains true for the current versions. Tour F12's are pretty basic
stuff... nothing to write home about. They work ... but they squeak. I'm going to try lubing them w/ silicone grease and spray
to see if they will stop. REALLY annoying!!!! At the top of the climb, be sure to clean off all ice to get the binding
to lock down into alpine mode.