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Works just like the original Arduino Mega, but cheaper. However, the reset switch is in a bad location, inaccessible if you have a shield. The original Arduino has reset switch in corner of board. Work around is to unplug usb cable, or wire own reset button on reset pin.
This board is very good quality and reasonably priced. This board follows the original design and doesnt use the infimous ch340 chip. Bought for 3d printer and am very happy with it. I would buy this board again.