I've used every type of lock ring ever made but I haven't spent much time agonizing over which might be 'best', fact is they all work quite well if used correctly. But, IF I had to pick a favorite I suppose it would be Lee's.
Cases vary between brands and over their life so, like Guffy, I expect to set each die as I want it each time I use it. Adjusting a die really isn't difficult OR time consuming if you know what you're doing. Otherwise, I suppose something foolproof like the Forster or Hornady split lock nuts would do well.