In a word: Impeccable

Everything that you say, and everything that you do, has an effect on other people. So why not use this in a positive way? If you genuinely tell someone that you like their work, or their clothes or their tan (at least in the summer) it rests warmly on them throughout the day, and creates a positive feeling. Just one sentence, one word, can have so much effect. The same is true for advertising. When you make people feel good about themselves, they feel good about you, your product and your brand.