We bought these fans for a trip to Walt Disney World in August knowing it was going to be incredibly hot in Florida. These little fans completely saved us from the 95+ degree heat by standing 1 hour plus long queues for the rides. They are small enough to fit in a small backpack and don't take up too much space. It also takes a long time to charge. I actually took a portable charger to the parks to charge my phones and I managed to charge the fan's battery on a few occasions when we used it quite a bit. The top two speeds are more than enough to keep you cool in the Florida heat. And even at top speed (which is REALLY strong, to be honest) the charge lasted most of the day in the park, on and off. Without these fans, I would never go to Disney again. My only issue with them is that they can turn on in your pocket or backpack if something hits the power button on the side. When you're walking around the theme park and your bag moves around so much, sometimes the button would push and turn on the fan in my bag. This happened a few times, but mostly I noticed my bag rattling with the sound of the fan and turned it off before the battery died. Little problem. That doesn't stop me from giving a strong 5 star review. And for the price it can't be beat. The only thing I can't speak to is the battery life. We were fine in August and fine now, but with any internal battery, you never know when it's going to die. But for the price I wouldn't worry about it either. Buy it, you will love it.