S-turn is a downright quality and fun rapid, but unfortunately is marred somewhat by being positioned directly above LZ Falls, upping the ante significantly.  The crux tends to be avoiding the hole in the last part of the S-turn and staying away from the undercut wall that follows.  At low flows, there's a bad pin rock below the main hole.  Positioning a catcher in one or more of the eddies below the rapid is a wise idea as blowing an eddy could prove deadly.