While initially happy with the U-Bolt Pro as a tertiary lock, it's proved not to be particularly robust and after a couple of years it developed a fault where detection of a finger being presented to the sensor failed. The lock core is also rather poor, being possible to defeat with a low skill raking attack that anyone with a basic lock picking set could perform. This needn't be a concern if not used as a primary lock, but something to be aware of none the less. The lock has been a useful convenience and performed acceptably for as long as it worked and with a decent app, but with the main feature now defective and a minimal warranty period meaning no replacement, overall it's not a great purchase and we'd recommend looking elsewhere if in the market for this type of device.
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