Reviews are out and quite good. Got the game on PC right now, playing with a Xbox 360 controller.
I am deeply, deeply humbled. Despite full traction control, ABS, and an auto gearbox (not to mention many, many hours spent playing Forza 2 and 3 without any of those assists), I can barely keep the car on the track for a full lap let alone a full race.
Get on the brakes too late? Off into the grass. Let off the brakes too late? Miss the apex. The braking window is just tiny. Hit the DRS at the wrong time? Spin. 3 feet off the racing line? You better give yourself a lot of extra margin for that corner.
Maybe its easier with a wheel...