Fitness

Kettlebells are great for those with limited storage space and budget, to extend beyond what you can do with bodyweight exercise alone.

If you want to get as fit as you can and don't have any equipment, simply adding a pull up bar to a doorway and having a kettlebell in the house can really open up a lot of options for building more strength and doing stronger cardio routines.

But if you have the space for it, traditional strength equipment (barbell and weights, rack, bench) is probably better for strength.

I liken it to a cast iron skillet: if forced to limit myself to one thing, it would probably be this thing, but in a well-equipped setting it would rarely be my first choice to actually use.