Brilliant game, with its flaws but overall experience is fantastic. Well worth £20!
Ups - The game feels well structured, very easy at the beginning, although very very hard at the end, almost impossible even: e.g there is once race where The actual gameplay itself feels very solid, with realistic qualities unseen in GT4 or even HD. The detail is rendered to a very high standard, including the interiors. Speaking of which, you can now choose a view from in the car to make it ultra-realistic, and everything works. The speedometers on the dash work, and the driver changes gears and everything, mind you this is regardless of whether you are in automatic or not. As well you have the content, including 5 ferraris and a track set in london! And to add to this you have Arcade with a Drift Mode, GT-TV online which works a bit like a car-oriented paying youtube and of course the online mode.
Downs - The soundtrack is fairly boring and full of stuff we've' never heard of, apart from a song by the Klaxons which has nothing to do with racing. The online is there but not as fufilling as say, Burnout Paradise. Also it seems to be completed quite quickly, even for a stretched out demo. Even if they kept the same amount of tracks in, they could have put more races in, but there you go.
Summary - Mainly this game is amazing, although it does have some flaws which im sure PD can sort out when the full version comes out in 'Mid-2009'.