When you are about to take the IELTS test, you should always consider getting a review course from an IELTS review center. There are lots of test candidates who failed to reach their target scores in the IELTS test because of the lack of preparation for the examination. Some candidates choose to do a self-review relying on books and review materials that are readily available online. However, the amount of knowledge gained from a review center for the IELTS is incomparable with self-studying.