Ok so after 3 years if using Cubase without ever approaching the control room I can now answer the original poster’a question. YES it is extremely useful and easy once you understand it!!! It’s really necessary once you start recording 2 or more musicians simultaneously like myself. My Tascam console is able to send multiple monitor cues but not as easily (at least for me). Learn this! It will only take one night and the benefits are awesome. I can’t believe I waited so long to use this function.