Or has the fad worn out?
It seems to be at its most popular in the UK and Ireland. I have used them before and they are shit. Good for cardio but nothing else.
Thoughts?
Yes, we even have 3+ big Kettleball societies/federations. When they first came here about 10-12 years back, they were just a quirky thing being promoted as a lost Eastern Bloc secret(a joke among a few American coaches was that the Russians were too poor to have proper sized dumbbells, so they made due with the old things).
Now with Crossfit, etc.... they've gotten far more popular, to the point that you can buy the smaller(less than 20kgs) sizes at almost any sporting goods store.
It is somewhat fun to play with the larger sizes, due to the oddness of feel, but the same could also be said for thick grip barbells, odd loaded dumbbells, etc...