I purchased these looking for an alternative to free weights and weight machines altogether.  As a retired and disabled veteran, my body aches at the thought of weightlifting.  So I decided to go with resistance conditioning for the purpose of general overall health maintenance and conditioning.  This kit is the perfect beginners kit, plus as your strength and balance improves, additional band(s) can be purchased with varying weight resistances.  I love the fact that it's portable and can be taken along with you on vacations, weekend getaways, etc.  The resistance bands have a life time warranty, and from what I've read, hassle free.  Pricing, lifetime warranty, convenience and practicality; this is a no brainer, especially for those like me who have physical disabilities and limitations, (physical therapy); and for those without such limitations and just want a blast of a work out, this is the way to go.  As with any exercise equipment or the starting of a new workout routine, always consult with your physician and not your neighbor or best bud!!!!