In the complex world of measuring hospital quality, CMS’ system of hospital star ratings based on patient experience scores has been a good step forward. If used correctly, it can help steer patients to the right hospitals. But it has to be understood and used in context—namely, when comparing similar hospitals. The new ratings CMS is about to launch are far more comprehensive, including many more metrics. This may seem like a good idea, but it’s worth remembering that when it comes to quality measures, as in so many things in life, more isn’t better. Better is better. We need to focus on what we can measure well and, most important, focus on what matters most to patients.