I've flown Flagship F 3 times, JFK-LAX, SFO-JFK, and MIA-LAX. I was unimpressed. The seats seem no larger or more comfortable than regular J; the food isn't necessarily better, FFD is nice but it wasn't available in MIA because FFD opens at 1PM and my flight was at 1:35, and SFO has no FL and LAX FFD has never reopened after COVID. (The time I flew MIA-LAX the guy in the seat in front of me said he did go into FFD at 1:00, was out by 1:10, and was the last person to board, but he was much younger and presumably more mobile than me!)

It's no loss. Maybe someday I'll fly overseas and experience a true F product.