I have sensitive skin, and can't stand how cloths start to smell like detergent when they get sweaty (before they start smelling like sweat that is) so I usually have to use all the fragrance free stuff. That being said, this stuff has been great - it does have a fragrance, but not overpowering, and it gets all the rank odors out of everything. I do do an extra rinse, which may help those people who were complaining about the itchiness, but I do that with all my laundry.

I've tried many different approaches to cleaning stinky synthetic gym gear and nothing worked. This stuff works on under armour and similar gear like nothing else i've tried.
In the past i've had to wash things more than once with baking soda, detergent, oxy clean... nothing worked as well as a single wash with this stuff. I highly recommend it.

DO NOT use more than the recommended amount though. I find that it leaves an itchy residue.

I bought this detergent for my tee shirts that I wear at the gym because after of few week they get a musty smell that doesn't wash out. Now I wash with Win and they still stink. Don't waste your money this stuff does not work.

The detergent was finally able to remove the stinky out of my sports shirts. This is great as I have been trying for years different techniques.

However, most of the bottles were leaky (from the cap) and made a mess in the box they came in.

Win does work better on my training clothes than Tide; it doesn't work miracles but it does get a lot of smells out, and it really is very concentrated: a small capful washes a whole load.