Already got a bit bored with Forza 4 now. Just seems very repetitive and it suffers from the age old problem of most racing games, no matter how low you set the difficulty bar, the AI NPC's always "git gud" and punish the smallest mistake, leaving you dead last. The idea you can just drive across the landscape ignoring walls and fences is also plain daft, IMHO. Lots of cars to collect but they all drive and sound pretty much the same, whether it's a Subaru or Dominic Toretto's muscle car from F and The F.
I can see 90Gb of HD space being freed up again, just a shame I played over the two hour refund window.