What your favourite pulley-rig clip and why?
The reason I ask is I'm having lots of release-fails with Breakaway Imps. That is to say they often don't release. Nothing worse than checking your bait only to find the bait gone but the rig still clipped into the imp.
This happened to me at least 6 times yesterday.

I have about a 20% fail-to-release on these, and I have no idea why they don't release. I make sure the bait is not jammed against the plastic paddle and there is plenty of bare hook in the clip.

I've tried the Splash-downs, which are great at always releasing, but the slider in them gets jammed up with sand and you have to spend time before each cast freeing it up.