Net Objectives has been assisting companies with Agile at scale for over a decade. As gold partners, we definitely see the value of SAFe®. However, different organizations need different solutions, even when SAFe applies.
Transition involves approach SAFe as a true framework, substituting practices and extend existing ones as needed. This page offers resources and ways to think about SAFe as a framework.
Resources related to SAFe
FLEX and SAFe Essentials (Article)