No, I have not grown Amazing. I have to grow quick maturing varies and Amazing takes 75 days. Even Snow Crown at 68 days is pushing my luck. Majestic (50 days, Rushmore (51 days) do a lot better. Amazing may be ok for fall planting. I am trying Bishop (Johnny's) this year. They also have Fremont. Twilley currently has Majestic 50 days, and Rushmore 51 days. They were also my source for Montana but have dropped it.
Majestic