We wore ours for our Labor Day trip. I wish I would have thought to cut them. It was too big for me, so I folded mine up quite a bit. I thought they worked fairly well and would definitely use them again if we took a trip in the summer. We re-wet ours every few hours, just using the water in the bathroom sinks. The instructions say you can use any temperature water, and we thought the sinks were fine.
DD absolutely loved hers and wore it for most of the trip. I wore mine if we were going to be out with no chance of A/C, but otherwise, I just carried mine in the bag.