Are kettlebells good?
Most people that use kettlebells on a regular basis love them. Detractors of kettlebells note their high cost increased risk of injury (kettlebells put the weight further away from your hand, which puts you off balance, the intent of this is to work your stabilizer muscles, but injuries do occur in people who try to lift too much before mastering the various kettlebell motions), and claim that you can do all kettlebell exercises with dumbbells.
