I have been involved in 2 medium sized-ish (~300) software support projects for western-nation's land forces project that brought in SAFe with a fanfare. Lots of ($$) training, everybody gulping down the coolade etc etc. It started off OK, but as with most of these ideological methodologies, our projects' circumstances started to clash with the SAFe 'way'. Our customer was very fond of his existing rituals (meetings, committees, progress meetings etc), but we also folded in all the SAFe rituals too. It seemed we were in meetings too much of the time, and we did a poor job of convincing the customer to move wholesale to the SAFe way. In addition, the organizational structure and governance models never operated in the SAFe way, with the customer's insistence on being in our shorts on every decision hampered most of the 'delegate decisions as deep as possible' philosophy. At the end of the day, it steel feels like RUP re-invented for 'agile' .. never again.