Returning customer since 2005. Bought the new U3219Q 4K USB-C monitor. Did my research on price and Mr. Teng sells the lowest, just as he did back in 2005. He made sure the order was escalated due to the fact that I had no monitor. He understood the urgency and made the extra effort foc. Monitor then arrived the soonest. I can vouch for this guy. Kudos Mr. Teng.