A thank-you goes beyond praise. Praise expresses admiration for great work. A thank-you expresses personal gratitude. In the case of a thank-you, you are explaining not just why the work matters, but why it matters to you. Take a moment to say thank-you. Do it in person, and do it in writing. Sometimes the thank-you has more meaning in private, other times in public. It rarely hurts to do both.
