My perspective (which won't be popular given the tone of this thread):
Yes, we did sign contracts agreeing to purchase this product when we finalized our cars, however the thought that the manufacturer must be completely inflexible on minor cosmetic changes is silly (in my opinion). I've custom ordered every car I've ever owned and never have had any difficulty making changes of any kind after submitting my order. That being said, those companies (Mercedes, BMW, Audi, etc.) have a fleet of completed cars and they likely just swap them out. So, the fact that I was unable to change from silver 21" wheels to grey within 2 days of finalizing is tough to stomach. The argument against is that once the order is set, they've already committed parts, supplies, etc. So, if that's the case, why are many of our cars being delivered with items due (spoiler and parcel shelf in my case). If the car is entering the line, the parts should be there to complete it. Wasn't that in our binding contract (to have our cars delivered as ordered)? You can't have it both ways (and yes, I understand that TM will make good on the items due with time...but nobody will tell me when or how). Disclaimer: I'm told the parcel shelf is being redesigned, which is why they aren't being sent out. If the car hasn't entered production and you want to alter it, why not implement a change order system and charge a fee (how about $100) for the cost of altering the paperwork and having a runner confirm with the factory that the change is in effect? The reality is that none of us truly know the process and all of this is just opinion...not sure I understand the visceral and antagonistic responses in this thread. None of us are 100% right on this...it's just the different expectations that we all have.
By the way...I love my car. The experience just needs some fine tuning for this level of product.