Well I'm a sim racing snob of the highest order ("if it aint netKar Pro or iRacing it aint worth driving" is my usual stance), but i have to admit I'm having a blast with this.
It took a good few hours of tweaking to get the FFB feeling decent, and once i started playing with setups I got the car feeling good. (forget the 'quick setups' they are gash)
Initially I had that awful gear change lag, but it turns out it wasn't the gears themselves but the sound lagging. As soon as I switched from their 'rapture' sound to 'software' it improved massively (and i got a few extra FPS as a bonus)
Anyone who deleted it within 10 mins is an idiot. I thought it was pants after my first 30 mins, but now I've tweaked a bit it's transformed the game completely.
It's no sim, that's for sure, but considering it's a Codemasters game I'm pretty impressed.
As long as they release a patch soon to fix a couple of annoyances I'll be having fun with this for quite a while.