Hi, I recently purchase the V-Max weighted vest (short style) for performing plyometric, uphill sprints and occasionally I'll shadow box with the vest just to add another degree of intensity into my regimen. The cost is $153 which is definitely a bit pricey compare to some of the other weighted vest, but for the price you definitely get what you pay for. The stitching and the material use for the construction of the vest is top notch. Thus, the vest is very durable and I can see this vest lasting a long time. The vest comes with cast iron bars, each weighting 2.5 lbs. Setting up the straps for the vest is straight forward and I had no major problem adjusting straps on my own. It roughly took me about 4 minutes to have everything setup and adjusted perfectly. One morning I decided to test out the weighted vest to see how it would perform while jogging. So I decided to go for a slow 3 mile jog with 10 lbs. added. Wearing the vest was very comfortable and most importantly, the vest barely bounce up and down which made the jog more enjoyable. Overall, I'm glad I purchase my weighted vest and I'll definitely continue to use it for training. Now my only regret is not going with a heavier weighted vest (40 or 50 lbs.) with a narrow shoulder strap apposed to a wider strap for shadow boxing. Now far as running with a weighted vest goes, I could see how people would injure themselves. You definitely want to start light (5 or 10 lbs.) and you definitely want to use smaller strides. Also try to land on the mid or the balls of your feet, not the heel. Lastly, no sprinting unless your sprinting uphill.