Played it for about 30 minutes, I won't be buying it. Least not till it's cheap. It's not that it's terrible, it's just not what you'd expect from Forza - like at all. They've taken a lot from Grid and NFS and pasted it right into an open world driving game.
One thing I noticed almost straight away was how power upgrades really don't give you the same sense of speed and handling that they do in the previous games. It's a step up from TDU: 2, but it's still not what I expected when I first heard they were going to be making it.
For when theres F' all else to play maybe.