The quality is below the official model from spakfun but given the price difference is normal. And in the end the difference is not noticeable because this model is fully functional. Caution, however, compared to the official model at spakfun must plug the FTDI upside if the message is obtained avrdude: stk500_getsync (): not in sync: resp = 0x00. If in doubt check the correspondence between the inscriptions and Arduino FTDI