For certain reasons, I've been looking into nutritional supplements. Rather than just blindly falling for marketing, I've been reading through a lot of scientific literature. However, there is so much that is difficult to distinguish for a non-expert like me. Out of confusion, I turned to foreign websites and emailed professionals directly. I received professional replies very quickly. I've purchased products from two foreign brands, and for any questions regarding their products, I've contacted them via email, and they always replied immediately. These weren't generic official templates either, but truly helpful responses. I'm not saying that everything from abroad is better, but this really shook me.
High efficiency, and being taken seriously.