After being a little sceptical of resistance bands/cords I was introduced to these by my PT; having used his for a fews sessions I was impressed on how much of a total body workout they give, plus how adaptable they are for literally any exercise I would usually do with kettle bells or free weights, plus with the range of bands you can easily adapt any exercise, and pair bands up to get the right resistance. I have now invested in my own set because I am away a couple of nights a week for work. They pack down pretty small (they fit easily into a carry-on sized case along with my other stuff, and the whole set only weighs a few kilos. Easy to set up in my hotel room and I can work out when I want. I would highly recommend Elastitone bands . . . . .