I like the Mustangs too, as you know. Here is my
Boss 429 in Forza 4. The game allows uploading pix in 0.9-megapixel and 8.3-MP sizes. Mine's the smaller size. The other is huge.
I've spent a good deal of time on the game today. It does what it set out to do very well. Everything is polished to a bright shine. The look and feel of the cars the best yet. The menu system is fairly good, but won't win any awards. Load times are longer than I expected, and that's with everything installed to the hard drive. Once it loads, though, all is perfectly smooth, as in 60-fps smooth while driving. There are no hiccups of any kind. Some replay-camera modes can clip through the racetrack occasionally. That's about it for obvious visual flaws. The car models are fantastic. They are quite detailed and are rendered well. The physics modeling is convincing. You can display "telemetry", what the math is doing, during replays. There's a lot there to see. It all looks great and behaves superbly.
My biggest gripe so far is that I can't practice before a race. That's one thing I miss From Gran Turismo 1. (I don't remember if Forza 2 had the same problem.) When you go into an event, you get thrown right into the fight without any chance to learn the track and adjust your car for it. Oh, you can do it--by selecting the event, seeing what the track is, backing out, then wading through the menus to select your car, select Upgrade, then find and select the same track for a test drive. It's awkward, and they should have given you the option in the racing event itself.
I like the RPG-like progression in general, where you not only gain player levels with XP, but also affinity for particular car manufacturers. One odd thing about affinity is that eventually parts discounts stack up to 100% after 4 increments. That's right--all your car's upgrades become free once you get enough affinity for its manufacturer. I already did it with Ford, and yes indeed, I verified that my Ford uber-parts cost is now 0 CR. So it's not even that hard an accomplishment. I just got the game today. They should probably nerf this in some way.
The game comes on 2 discs, a play disc and an install content disc. There are also redeemable codes in the box for about 500 MB worth of extra tracks and cars. It all adds up to 11 GB on the HDD. Lots o' stuff!
I quit playing about an hour ago, when my performance started to go South from being tired and bleary-eyed. It's definitely addicting if you're at all into this kind of sim. More to come.