I tell you after trying out the demo I certainly wasn't convinced or impressed. But after trying out some of the other cars and tracks at one of my friends I can say that it's really a nice sim.
They should put at least one fast car in the demo + explaining all the variations of the tracks.
I'm convinced now after trying out the REALLY fast cars and it feels about the same as taking my own car for a spin on the highway at + 210 km/h.
In other words LFS feels the way a really good sim should.
I'm glad I finally found an alternative sim to RBR that has all tarmac tracks after trying all the Simbins and rFactor.
About 1920 X 1080 resolution
I have two monitors, 1 PC monitor at 1280X1024 and my SONY TV at 1920X1080 and when I play RBR the game automatically pops up on my TV.
With RBR I have changed the text in the ini file to 1920x1080.
Have I missed something cause driving the formula 1 car in past 170 K it feels like driving in about 10 K. Absolutely NO sense of speed OR acceleration !