Coverage does not guarantee effectiveness. Lack of coverage guarantees the behavior of uncovered code is not checked. Use the tool for what it is good at. It's

Coverage does not guarantee effectiveness. Lack of coverage guarantees the behavior of uncovered code is not checked. Use the tool for what it is good at. It's not a substitute for code review or writing convincing tests. Granted even convincing tests are going to miss important stuff, but they will miss less and after the initial bout of bugs will become quite good (because you write regression tests for EVERY bug right?).