This chapter summarizes some of the benefits that one reaps from taking the next step and continues to learn more advanced techniques in quantitative analysis. By advantages it means the benefits, the plusses, and the pros of learning and using the advanced quantitative methods. The primary advantages are that one can learn to measure more precisely, think beyond basic null hypothesis significance test, avoid the problem of multiple comparisons, increase the statistical power of your studies and so on. By disadvantages it means the difficulties that are encountered in learning and using advanced quantitative methods. In analyzing whether the data in a study meets the assumptions of advanced statistical procedures, data screening is often essential. It is considered as a good place for L2 researchers to start expanding their knowledge of advanced statistical procedures: It covers advanced statistical techniques; it was written by L2 researchers; it was written for L2 researchers; and it contains examples drawn from L2 research.