The practice tests that you'll have access to via CertFX allow you to experience and get a feel for the exact types of material that will be presented in the actual certification exam.
With exam simulation mode, you can customize the practice tests that you take based on specific keywords or by sections - for instance, if a particular area is especially difficult for you, you can have your simulation exam focus on it.
Detailed explanations are provided with every answer, allowing you to delve a bit deeper and get an even better understanding of the material. Links to additional reference materials are provided when more information is needed. Finally, free updates are provided for every practice exam purchased through CertFX.
Another great way that CertFX allows you to customize your IT certification exam preparation experience is by allowing you to use its adaptive mode to hone your practice test to your exact testing capability.