Kettle bells should have gone the way of that old-timey belt vibration machine and corn flake enemas.

Only those things don't work and kettlebells do.

They may "work", but they're lousy bang for your fitness buck for strength training.

They're okay for endurance/conditioning work, but with the exception of the ridiculously expensive adjustable ones you can't add significant weight without buying another heavier (and overpriced) kettlebell. They give a great illusion of getting stronger, but most of that progression comes from the person getting the hang of eccentric movements, not muscle development.

Hey, I won't argue that they're in any way worth the money you're going to pay for them these days. Thankfully I have unlimited access to an insane number of them in varying weights as well as a homemade, adjustable kettlebell which I use mostly for swings.

Five for Void trolling the bouncers.