I like them for several reasons. Some female RCA's vary in size and invariably, one of them is small and the male fits loose. Thus, the locking RCA can be a way to ensure the fit is consistent. They are a pain at times, but they can work. I prefer XLR connectors if given the choice.
anyone else hate locking RCAs?
I find that whenever I tighten a locking RCA connector even a little bit, it becomes a battle (and one that I fear will result in casulties -- the rca connectors, the cable, the rca inptus). Lately, I find myself unwilling to tighten them at all. And then the barrels are always falling off and getting lost. Just give me a nice regular connector any day.