This document provides an overview and review of critical illness insurance. It discusses how critical illnesses like cancer and heart disease can impact finances through lost income and medical costs. It then outlines sources of funds people may have like health insurance, disability insurance, and savings, but notes their limitations. The document proposes critical illness insurance as a potential solution, explaining that it pays a lump sum that can be used flexibly upon diagnosis of a covered critical illness. This allows focusing on treatment instead of finances. The document also clarifies what critical illness insurance is not, such as health care insurance.