''⭐⭐⭐⭐⭐ Simple and powerful. Love it. Sun Lau does a terrific job illuminating the use of Excel and its practical, real-world application in business. As a “student” of his (with years of Excel experience myself)I highly recommend his Excel Analytics OS course. It’s an inexpensive way to brush up on basics while learning advanced modeling and techniques including cool new features in Excel 365. (Vice President, Market Access and Payer Strategy, United States)''