Here are two criticisms about the GPL demo:
This is a very difficult sim to drive, like all Papyrus sims. Even with a
Nascar Pro Wheel, it is difficult to stay in the racing groove. Papyrus
sims seem to have a skittirish and slippery driving model that makes driving
a straight, (especially one with a slight kink in it,) not that
straightforward and that makes braking and cornering very difficult. I am
not quite sure if driving as if one were on ice is an accurate portrayal of
real race driving. But then again, I've never driven a race car. Perhaps
someone who has driven a race car can enlighten me about this.
The straw bales don't act like straw bales in this sim. A car slamming into
them might as well be slamming into an armco barrier. This is a very major
problem because with realistic damage on, you are going to destroy your car
by just clipping one of these hazards. The bales should be able to give way
and cause mimimal damage, unless they are right up against the armco.
Also, there are very little of these things around so in most cases you end
up slamming into the armco. More bales, and those of the forgiving variety,
are definitely required.