Megatron is a fine plant here in my zone 6/7 garden in SW VA. It has taken abuse ( I've moved and divided it several times) and seems to take it all in stride. Some of Jamie's diploids no longer grow here because they have somewhat weak scapes. But these scapes are sturdy, blooms large, imposing, and all in all, a fine plant.
Sometimes, the blooms do this, OMG!
I believe it's the parent of Jamie's SSM winner, Heavenly United We Stand, the one he's called his best registration . ( publicly, at least twice that I heard! )