I have a set from when it first came out that I was able to pro form from the shop I worked at. From my experience I'd say it helps but if I was paying $180.00 for the stuff I'd rather spend the money on something else. I have experienced two bulls that I feel it made a difference on. Both times I was sitting on wallows and both times bulls had me pegged (they could make my outline out against the tree I had my back to) and both times after a thorough look over they continued like I wasn't there. One bull died and the other lived since the wind shifted on me before I could draw my bow. It doesn't negate the basics of being aware of the wind and movement, but helps in some of the situations where elk spoke with out giving them a good reason to. The camo patterns are pretty dark for where I hunt and the original material isn't al that great of a next to skin base layer. If you're doing a lot of hiking it's annoying to have to wear an extra layer for the limited situations it might help you in. Mine only gets used anymore if I'm spending an evening sitting on a wallow, the rest of time it stays in the duffle bag, and for rifle hunting it stays at home.