James, the bad points i know of are sometimes the weird penalties (exiting pits, be sure to stick to the side of the road for a while as it seems to give you a track cutting penalty that slows you for 5 seconds)
The AI isn't the smartest, and apparently just sticks to it's racing line regardless of who is or isn't their (however I haven't noticed this myself, I have no issue with the AI)
Also apparently the AI doesn't get track cutting penalties (someone I know forced the AI off track on purpose, but their laptime still counted).
Minor things though in my books overall.
I haven't been able to use my wheel with pCars yet, as my PC desk isn't stable enough anymore, so the wheel plus force feedback would break it
so for now I'm on an xbox controller xD I don't like the karts at all, for me they handle like garbage, either slight understeer or snap oversteer. Everything above karts though handle fine and as expected.