Had a couple of hours yesterday to give it a play...Very impressed, the best game featuring a LC I reckon.
It's a bit of course between a proper simulation and a out and out game, just the right compramise between getting the right racing line around corners without having to worry about your tyre pressures etc.
The graphics are incredible (especially on the LC) very realistic, even things like the detail on the LC's interior look like they have been done properly.
Really looking forward to playing it online as well, because the xbox live system lets you chat with other racers using a headset, so it's quite social as well.
I have noticed a couple of things which could of been a bit better, first being it's a shame the weather do'sent affect your cars handling a bit more..driving round the nurburgring in near blizzard conditions should bring a LC down to about 15mph not 100! It's also a bit of a shame they could'nt split the brakes on the bikes, on the game you can't just use or balance front to rear brakes which makes them seem a little unrealistic.
However, overall I'd give it 8 out of 10 and fully expect it to keep me out of the garage all Winter!