Reliable. To a certain extent, examination experts can help students improve their grades, but they can't rely entirely on it to improve their grades. Its skills can simplify the process of answering questions and improve the speed and accuracy of doing questions, especially for some types of questions, the effect may be more obvious. However, learning is a long-term accumulation process, and students still need to pay attention to mastering basic knowledge and cultivating comprehensive ability. Therefore, the master of postgraduate entrance examination can be used as an auxiliary tool, but it cannot replace the traditional learning methods and efforts. It should be noted that although some students and education experts have given positive comments on the examination master, some people are skeptical about its effect. Therefore, students should weigh and make decisions according to their actual situation and needs when choosing whether to use exam experts to evaluate classes. At the same time, students should also understand that any grading method requires effort and time to achieve good results, and there is no shortcut. To sum up, the scores of postgraduate entrance examination masters are reliable to some extent, but they are not omnipotent artifacts. Students should keep a rational attitude in the process of using, and choose and use according to their own actual situation.