The Ready Reel looks a useful piece of kit. I've seen similar things used for both sea and freshwater fishing and they do the job well. The NATO fishing kit is not actually that much good IMHO. As an angler I was given one once and couldn't find anything in it that I had any confidence in being able to feed myself with.
I prefer to carry a few loose, eyed hooks in different sizes, two different breaking strain lines (on the same spool) a couple of little jigs and spinners and a handful of weights (split shot and small ledger weights) With this kit I'm pretty sure I could stand a pretty good chance of rustling up a meal from most waters that contained edible fish.