The goods ones that are fairly beefy are not bad, avoid the ones with an air compressor, light, radio and expresso machine. They do none of those well. Please be aware that none of these will jump start a diesel.(Truck at least, don't know about a diesel car) If you do get jumper cables make sure to get the really thick ones ( this has already been said) also try to buy ones that will go from the front of the vehicle to the back plus some ( think busy road jump starts!) also one of the nylon carrying cases will be handy.