I've been jogging before sunrise for a few weeks, and while I have an LED light, I felt that I was still not very visible to the few cars that are out at that hour. I was looking at reflective vests, but decided to go with this pouch instead, since it seemed like it would be handy for my keys.
It seems well made, and it's pretty comfortable. I'd note that I'm a pretty medium sized woman, and I have to cinch the belt in as far as the straps will allow. It has side slots to tuck the excess strapping into, so it's not flapping around, which is a thoughtful feature. But if you are petite (say, a waist smaller than 28" or 29"), this belt will be big for you.
The reflective trim seems to work well. Cars do seem to notice me a bit sooner when I'm wearing it. It will be good to wear while walking my dog on dark winter evenings, as well.
I wish that it were a little less dorky looking, but, well... it's a neon yellow reflective waist pack. I can't really think how they'd make it "prettier" without reducing its functionality.