I've been using Candy C's now Candy 2's for years on my MTB and now I am adding another set for my cross/gravel bike that I am currently building and they are the easiest pedals I have ever used to clip into by a long shot. I don't use any additional shims or what not. Just put the cleats on my Specialized mtb shoes and good to go.
It's a different motion to clip in than in road pedals or SPD's that I found works best for me. I just put my foot down on the pedal and then just slide the shoe forward or backwards with the foot depending on if my foot hit forward or aft of the pedal springs when it landed on the pedal to essentially roll the pedal springs into being clipped in.
I have also used SPD, SPD-SL, Older Look, Look Keo's, Wellgo SPD knockoffs, and speed plays.
Last edited by jitteringjr; 01-12-18 at 08:35 AM.