I'm a user Joe, from the beginning of it, and I can tell, I won't NEVER fly without it no more! Once you get used to it...
Most interesting benefits are the real time tweaking and the weather smoothing wich make the look of weather like never before in auto mode.
Best using a weather engine for smoothing so there's no more sudden changes in the weather, you get a nice fading.
No need to tweak for hours and hours, just take some time in the beginning to make settings the way to your likings for the sim while in manual mode, make a couple of test flights, you can make some more finetuning in the mini UI panel. My settings on the main UI are mostly default and did some tweaks in the "In-sim panel" Then save my preset and all is set for next (Auto or manual) flights. I even combine PTA, a few things but let EF do the greatest part.