Ok, I decided to give it a shot. It basically added a bunch of new stuff to my cfg.
First impression is WOW

fps shot up by about 10-15fps. I just did a quick take off from CYYZ and KJFK and it seems so much smoother. Oh man, big props to Jesus for helping FS fans.
Now I plan to try it with v-sync off. Didn't know it affects performance. I've been using it for a long time. If image tearing is not too bad, I'll leave it off.
Now, it did tell me to use an external fps limiter @30fps. Gonna have to try that too.
And I thought my default cfg settings were fine lol. THANKS guys
