Well if Hidden Valley was fast, Ontario is definately exciting. This track also requires some good processor power to run, but a good 486 machine should have no problems as long as you have v1.21 of Nascar racing installed (a definate requirement).
Unlike other tracks where the groove is at the bottom, Ontario has a groove that is in the middle to the high part of the race track. WHOA !!! Let the nightmare begin, since that's where the AI stick solidly. Passing at this track can become a real problem if you aren't careful. But that is half the fun of this 4/10th mile high banked oval.
All told, this is another one of the finest short track venues for sim racing around. I think you will agree our partners in Canada, did a fine job putting this one together.