It was actually customer service which made me an Anker fan, the speed and reasonableness was remarkably better than others.
That has only been strengthened each time. So I feel somewhat upset that @maciej86 had a bad experience. Avoid AliExpress and possibly review if Anker is best for you given how it is at AliExpress. I’d go as far as recommend buy another brand as on the inside they are similar products across other brands, but to be clear that’s to not avoid Anker but to avoid AliExpress. Other brands may be able to sell more locally to you. Anker is the best brand. But if you have to use, say, Aukey, Ravpower, Belkin, or some other brand to avoid the Awful AliExpress then so be it.
With a typical selling price < $100 it’s probably not worthwhile for you to buy Anker if that means AliExpress and the awful return postage risk.
Anker products are reliable, you had a bad experience with a bad unit. Can’t you buy Anker some other way, Amazon, or one of their approved local sellers?