I spent some time with the Juiced 2 demo, available on the Live marketplace. From what little there is to see and do within the demo, I can say that the game does not appear to be broken. It is however, bad.

I've never played the original Juiced, so I can't make any comparisons between the demo and it's predecessor. Juiced 2 appears to be a poorly realized knock off, of Need For Speed Carbon. Even if the developers had done an admirable job of mimicking carbon, that still wouldn't be an achievement worth celebrating.

If the demo is in any way a clear indicator of the games overall quality, then avoid it like the plague. I own a large number of really tepid and underwhelming titles and I wouldn't purchase Juiced 2 at a bargain bin price. If I won't touch it, it really and truly does stink.