What's the Catch

Any Process that is suspended does not respond to user input in any way, shape, or form. No maximizing, minimizing, resizing, text input, mouse input, audio output, video output, nothing AT ALL until it's resumed. The program is frozen in whatever state it was in. As such, I recommend minimizing any programs you haven't excluded so they're not in your way. This is generally why Microsoft and other developers rarely use this, it's incredibly user-unfriendly to a user that doesn't know what's going on to their system.