I got this for my Dad for Father's Day as a gag gift. It was a hit with him and everyone else that saw it. If I were rating this item solely on that, I would give it five stars. However, I would have liked it to have functionality too. For that reason, I give it three stars.... The fan comes on when in direct sunlight, but the fan barely provides any "cooling". Without looking at it, I could hardly notice that the fan in the hat was on.
Bottom line: Get it as a gag...not if you think you'll get constant refreshing breeze on your face while working in the yard.