Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very dissapointed in these glow sticks

Definitely disappointed in these glow sticks. I've found numerous duds in the pack of 100 that simply didn't glow at all when cracked (and I cracked and kneaded the entire stick to make sure it was fully cracked). Most of them would glow very dim. I even timed them once I cracked them to see how long they would glow for. They ranged from 15 mins to 1hr 40min. Very disappointing. I know the price looks good for how many you get but you are not going to get the quality that you will expect. I would recommend not buying these and look for others that are higher quality.