Kettlebells are a great workout. I would recommend taking a few classes with a certified instructor before trying the workouts on your own. If done incorrectly, there's a high risk of injury so you need to be very careful.
Here's an article you might also find helpful: www.sparkpeople.com/resource/fitness_artic
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford
"No matter how slow you go, you are still lapping everybody on the couch."