I managed to get a couple of hours in last night, here's my thoughts (for what they're worth

)
I'm not going to talk about all the fluff, it's the handling that needs the most discusion I feel. Like most others who have dabbled in it so far - it's a bit 'meh'. (To start with).
Going back to Brandon66's post in the preview thread, adjusting the control settings in the control adjustment menu option
is a must. For me, it was the brakes that need the most attention. Here's my settings (from the top of my head):
Controller settings:
Steering Dead Zone 15%
Accelerator Dead Zone 15%
Brake Dead Zone 15%
Acceleration Sensitivity 40%
Steering Sensitivity 40%
Braking Sensitivity 30%
Speed Steering sensitivity 80%
Experienced, full damage, SC -off, TC-low, ABS-on.
Once I set these I was happier with it - but not entirely satisfied.
It wasn't to I got to the upgrades, that things really did look-up. Sod the turbos and the likes, the first port of call should be the suspension and the tyre upgrades - as they completely transform the handling. If I was to now compare the handling with any previous game I've played it would be the TOCA Race Driver series. And that suits me just fine.
So, just give it a bit of time, get the control settings right (which you can't adjust mid-race annoyingly), plod through a couple of Tier 1 events and unlock the upgrades options for the Tyres & suspension and then make your mind up would be my advice.
Sorry, it's a bit brief, busy at work at the mo.