If you are a power/push jerker, they'd be indispensable.But if you are not, and are not structurally designed to overhead squat with the narrow grip (like Michael and most of us, who might not "die tryin'" but instead would simply develop shoulder impingement), wouldn't the logic amount to doing a movement that you will never do in competition, and that stresses your shoulders, and that therefore may impede the intensity or quality of your training in the lifts that you actually will do in competition?To each his own, and whatever works, more power to 'em. (Assuming one knows, in fact, that a novel training exercise actually does improve results, which, in my experience, is almost never demonstrated for the latest or weirdest fad lifts.) I just don't know what difference it makes that some new or different movement "packs a kinesthetic wallop." Lots of things, I suppose, pack a kinesthetic wallop. But will they increase a lifters' snatch or jerk? If not, they offer only perhaps fun (nothing wrong with that), but they certainly drain training resources (e.g., time, energy, longer recovery interval, injury risk associated with unfamiliar movements) away from the movements that are known to produce higher competition results.