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Not sensitive enough thus not doing its job

It doesn't work at a 25-degree angle, but works at a 45-degree angle. It's useless, so I'm returning it.

After using the product for a few days, i can say that it does not work as well as i had hoped. With only one sensor positioned on the upper part of my back, it often fails to detect poor posture when i'm sitting at my desk working on a computer. I suspect the trigger angle is not optimized for seated desk work. It seems to perform better when i'm walking around.

While the reminders aren't always triggered at the right time, the device does encourage me to straighten my posture occasionally, so i wouldn't call it a complete waste of money.

This device is so handy if you’re a sloucher. i often forget to fix my posture but this device really forces you to do it. so useful! good quality too!

Apparently it seems to be of good quality! Just tested it and it seems to be good!