Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Underwhelmed...unfortunately.

The product works well, just not for long. We used it on a camping trip recently, and I was pleased with the light output...until the batteries died 45 minutes later. The replacements that I bought at the store lasted about that long...so I'm left wondering. "Is my snazzy new LED blinker really any better than the regular bulb ball? It isn't quite as bright...but lasts forever. Batteries are expensive!