I like S-tracks. Been using them for years. For whatever reason they're the kindest to my gammy knee (a bad injury from a while ago). The main, massive drawback is that they're not really serviceable. Once the bearings go they're ready for the bin.
I found that they were pretty poor at actually holding on to my feet. I came unclipped from them on several occasions both on and off road including one time mid air on the MTB which made for an unpleasant landing.
I like S-tracks. Been using them for years. For whatever reason they're the kindest to my gammy knee (a bad injury from a while ago). The main, massive drawback is that they're not really serviceable. Once the bearings go they're ready for the bin.