the handling is actually fairly spot on! Having built and driven one, they are very VERY dependent on how they're set up, especially suspension, tyre choices etc. Also all depends on engines, rear axle setups and so forth as to the weight distribution.
But i agree with Tristran, if you drive it like your driving a computer game, it'll bite you in the ass. If you consider that you're driving a car with a minimum cost (new) of about £12000 upwards, and you've put all the work into it, you'll find it a lot smoother.