I got these as a way of carrying Isotonic drinks during a half marathon. It did the job perfectly in the context of running 21K.
However I think it unlikely I will use it often outside of these longer runs, especially training. You need to make sure you get the correctly sized strap, which fastens using velco. I wear 34" trousers and the medium was fine. It is secure and comfortable although can take a little bit of running each time to find the right tension of the strap for it to feel comfortable and for the bottles not to bounce. When this is done you would hardly know they are there.
I found the bottles are water tight if you push down the stopper firmly, but it is easy when running to not do that. So you get water dripping over the backs of your legs. Which actually, quite weirdly, was quite refreshing. The pouch is twin layered and the mesh looks strong. I keep my phone in there but trust keys only to the pocket in my shorts.
I have since used these in training runs 10k+ and find the belt and bottles excessive (where performance is not critical) and prefer to just carry a bottle. I will wear these for my next half marathon, one bottle full of gel and the other isotonic fluid. A definite must have for any longer race, especially if water stations are rare.
Finally, I should mention the quickdraw technology is not a gunslinger correlation but reference to how easy it is to get the liquid from the bottles into your mouth. It really does squirt out as you squeeze the bottle. It is much better than all other bottles I have used, meaning you spend little time trying to get drink into you and more concentrating on the road ahead.
I have gone on, hope this was at least helpful.