This booster has been great for the NJ-HI Railers 30' X 180' multi level layout. It has minimized blinking engine head lights to the point where virtually all engines run without a problem.
While you are planning your mega layout, make sure you understand the best way to run and segregate different types of wires before you start wiring up the layout. Wiring will make a difference on the performance of how well your engines run.
Good luck
Bob D