On 20 March I ordered the 81-370-12064-CD
2012 Jeep Grand Cherokee Service Information CD (English). The total was $164.90 including ~$30 "S&H".
On receipt it turned out that:
1) It was only usable with specific versions of Windows and Internet Explorer. (not Windows 8 or my desktop Windows 7. Firefox or Mac or Android or iOS, fagedaboudit). Even with later versions of IE over 2700 .svg files do not display - these seem to be mostly wiring diagrams - I had to stand up an unpatched Windows XP machine to see everything.
2) I have been asking monthly when a fix would be available. The latest was sent on Aug 16. On the 19th I received this: "will...contact you with a resolution within 2 business days."
If it wasn't that it does contain information about my heep that I need, particularly specific identification of trouble codes, unavailable elsewhere it would have been returned.
Just be forwarned that it does contain vital information (my copy even includes the 3.0 TD, but to experience it fully you need an obsolete computer.