For what it's worth, I've had Speedplay X on my road bike for 7 years. I love them. I like the total float, no tension setting. I switched from SPDs and I had no issues.
Fast forward to this year when I built a custom road bike more for tours and long rides where I need very low gears. I wanted recessed cleats for this bike and got the Frogs. I had a real adjustment period as I kept unclipping accidentally. I also had trouble knowing if I was really all the way clipped in. After DH told me to keep my heels in, it got better and now I can hear the click sound when clipping in. It's just very passive compared to the Xs or other pedals.