As with any exam, it will vary from person to person as to what is deemed to be difficult. While one person may have trouble with groups, another will find RAID configurations to be hard to understand. There are no real issues with this exam that you need to watch for other than to know the objectives. Hands-on experience that deals with managing and maintaining a Windows network will be of immense value, especially when it comes to the simulations. Basically, the simulations present a mock-up of the computer screen that behaves similarly to an actual server. In a simulation, you may have to set permissions for a folder or add users to a group or some other task.