Sometimes works, sometimes doesn't, and battery life is bad

I really wanted this item to work. Unfortunately, it didn't always vibrate when is supposed to. Sometimes there is a delay (which means you miss your call), and other times it just doesn't vibrate at all. The vibration isn't very strong either. The last straw was when the battery died after just two weeks even though I don't typically get a lot of calls / messages. Maybe if it cost $10, but at this price it is just not worth the hassle.

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