I won one in a contest on UMS. Even though I didn't get to choose the camo pattern I wanted, I am extremely happy to have it. It breathes while padding your head a little for when you get shot. It's very easy to put on, just like a bandana. The thing I like the most is the tails protect your neck from the sun, which is always a problem for me. They're very comfortable and look good at the same time.
Conclusion:
Buy one if you want to protect your head from the sun, sweat, and paint. They're well worth it. You can't buy anything better for your head for $10.