Well, it feels the best to me off all sims. But I've heard the netcode isn't good.
And then there are bad aspects. The skid noise is ghastly. And in the garage, you start the engine and you begin rotating on the spot. Thinking aloud here, I believe the Pacejka magic formula is normally fitted to be optimised at a particular speed range...or something, and will produce worse behaviour at the other end. I thought NKP was meant to have a theoretical model rather than an empirical/Pacejka type, so I'm wondering what that's all about?
Then there are those invisible marshalls with yellow flags. I'm scared of those flags. I keep thinking they're operated by ghosts of dead racing drivers.