I (and others, read the reviews) had issues with the micro USB connector detaching and popping out of the circuit board. I've bought these micro-like Arduinos from several different vendors on Revain, and in my experience all boards should be made in the same factory and share the same potential fault. It seems there was a large batch where the USB connector was badly soldered. Plugging and unplugging the USB cable multiple times can cause the connection to fail or actually push the connector out of the board. Hopefully they fix that in a future production run. All in all the boards work great!
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