Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Difficult Switch!

I purchased this item for an 8-days white water rafting trip on the Colorado river. The switch for this item is a "sliding switch," meaning you slide it side to side to turn it on/off. It worked fine for the first few days until sand got stuck between the switch and I was unable to slide the switch. Most of my friends purchased a push button version of this headlamp and they were happy with their purchases. My recommendation is that if you are going somewhere sandy, you might want to consider purchasing the other version of the headlamp.