If you want to add the supplied cars, circuits, etc. This collector's edition, make sure you have an Xbox Live Gold, otherwise everything will not serve you content available !!
This is stated nowhere on the box and very few websites so specify. You have been warned!
In short if I had known, I would have simply "normal" version sold in 49 promo in October.
Knowing how Microsoft and Turn10 DLC abuse of all kinds, and pricey, given everything that is advertised as cars for download later, I think full, the game will return to well over 100! : /
That at one time it was enough to be diligent (or hard sometimes!) To release a bunch of content BUT playing, only!
Now everything is currency with real money, from the first seconds of the game
You want to view all locations of the races? Have all the cars in the game? Get faster experience?
All this is feasible: leave your VISA, purchase credits and voila, you have almost-everything unlocked, without any merit, in less than 10 minutes! (But you will have cost a fortune)
Aside from that, this Forza Horizon is really extra, it surpasses the Test Drive Need for Speed and other recently released.
This is a game purely "Arcade", so if you prefer simulation games, opt for Forza Motorsport 4. The other reference!