I like the pull up bar, I think that's the only item that you may find useful. Regular pull ups are a great way to build up stamina and it's good for cardio. Everything else in the kit you can do at home by yourself without the accessories.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~