Ordered a Topping E30+L30+RCA cables bundle. Then, I got an email on Friday offering to switch to a cheaper RCA cables because the Topping one included in the bundle was out and refund me the price difference. I replied on the same day, got shipping info on Sunday, and received the package along with the refund (to Paypal acc) on Monday. All of this accompanied by emails checking my status each step throughout the process. Never had customer service this good very from a Chinese retailer.