There are so many things wrong that I am just going to stay right where I am on Windows 7.
If I let GWX upgrade my computer, it will brick it.
The offer only applies if you upgrade an existing install not a fresh install.
You surrender control of what updates install and when they are installed so I have no interest in becoming an unpaid beta tester.
There are also a few applications I still use that are a challenge just to install and run under Windows 7 much less run, they are a lost cause on Win8+