Dell repair adventure, day 3

As in my last adventure with Dell, the "next day onsite" service has turned out not to be as advertised. If you don't remember that visit with Alice in Dell Land, here's a pointer to that string of posts.
Although my initial Email discussions with Dell's technical support team went well and I was promised a speedy repair of my totally disabled Dell laptop, I've just gotten a call telling me that the needed part is on back order and they would call me "as a courtesy" when the part becomes available. So, paying extra for the "Next day, Onsite" service contract doesn't guarentee a speedy recovery of a system.
So much for Dell's support. After my last round of discussions with Dell, I would have hoped for a better performance this time around.
If you're a business decision-maker, I would urge you consider the experiences I've had before selecting a Dell product. I find it simply unacceptable that Dell would sell "next day, onsite" contracts and not have the resources available to fulfill the promise of such a contract.
As it so happens, I have a Mac and a Linux machine to keep me on the net and however close to productive as I ever come.
Have you had similar experiences with Dell?