I, like many others, have been a racing 'addict' since the first F1 title and GT title on the little grey box!
This is a brilliant racer, far better than GT5 - yes there are aspects of GT5 that are superior BUT if you are after a full on racing simulation then this is the game for you. GT5 simply is a driving simulator - the racing is rubbish with the cars simply acting as mobile chicanes.
With regard to the handling I have had no issues at all; yes it is twitchy, but therein lies the beauty - you need to be good at the inputs as you would a normal car at that sort of speed.
If you made a slight wheel adjustment at 50kph, that is all it would be; the same movement at 250kph would mean a certain crash - this game reflects that detail fantastically.
Throw in suberb AI of your fellow racers and you have an excellent game that thoroughly challenges and leaves GT5 looking somewhat a damp squid (whilst not taking anything away from a good game)